# User:Guy vandegrift/Quizbank/Archive1/How things work/Study guide 1

## HTW T1_Study

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### HTW T1_Study-v1s1

1. Mr. Smith starts from rest and accelerates to 4 m/s in 3 seconds. How far did he travel?

___ a) 6.0 meters
___ b) 5.0 meters
___ c) 3.0 meters
___ d) 4.0 meters
___ e) 7.0 meters

2. Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

___ a) 7.0 meters
___ b) 8.0 meters
___ c) 11.0 meters
___ d) 10.0 meters
___ e) 9.0 meters

3. Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

___ a) 12.0 meters
___ b) 10.0 meters
___ c) 11.0 meters
___ d) 8.0 meters
___ e) 9.0 meters

4. Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 2 seconds. He then travels at this speed for an additional 1 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

___ a) 6.0 meters
___ b) 5.0 meters
___ c) 8.0 meters
___ d) 9.0 meters
___ e) 7.0 meters

5. Mr. Smith is driving at a speed of 4 m/s, when he slows down to a speed of 1 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

___ a) 9.0 meters
___ b) 8.0 meters
___ c) 7.0 meters
___ d) 10.0 meters
___ e) 11.0 meters

6. Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

___ a) 23.0 meters
___ b) 19.0 meters
___ c) 22.0 meters
___ d) 21.0 meters
___ e) 20.0 meters

7. Mr. Smith starts from rest and accelerates to 2 m/s in 3 seconds. How far did he travel?

___ a) 3.0 meters
___ b) 4.0 meters
___ c) 6.0 meters
___ d) 7.0 meters
___ e) 5.0 meters

8. Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

___ a) 11.0 meters
___ b) 12.0 meters
___ c) 10.0 meters
___ d) 8.0 meters
___ e) 9.0 meters

9. Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

___ a) 20.0 meters
___ b) 16.0 meters
___ c) 17.0 meters
___ d) 19.0 meters
___ e) 18.0 meters

10. Mr. Smith starts from rest and accelerates to 3 m/s in 2 seconds. How far did he travel?

___ a) 2.0 meters
___ b) 1.0 meters
___ c) 4.0 meters
___ d) 3.0 meters
___ e) 5.0 meters

11. Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

___ a) 24.0 meters
___ b) 23.0 meters
___ c) 26.0 meters
___ d) 25.0 meters
___ e) 27.0 meters

12. Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

___ a) 13.0 meters
___ b) 16.0 meters
___ c) 17.0 meters
___ d) 15.0 meters
___ e) 14.0 meters

13. When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

___ a) the cloth is more slippery when it is pulled quickly
___ b) the cloth is accelerating for such a brief time that there is little motion
___ c) objects don't begin to accelerate until after the force has been applied

14. If you toss a coin into the air, the acceleration while it as its highest point is

___ a) down
___ b) zero
___ c) up

15. If you toss a coin into the air, the velocity on the way up is

___ a) zero
___ b) up
___ c) down

16. If you toss a coin into the air, the velocity on the way down is

___ a) up
___ b) down
___ c) zero

17. If you toss a coin into the air, the velocity while it as its highest point is

___ a) down
___ b) zero
___ c) up

18. A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

___ a) northeast
___ b) northwest
___ c) southwest
___ d) south
___ e) north

19. A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

___ a) northwest
___ b) north
___ c) southwest
___ d) south
___ e) northeast

20. A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

___ a) northeast
___ b) northwest
___ c) southeast
___ d) north
___ e) northeast

21. A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

___ a) northwest
___ b) southwest
___ c) north
___ d) northeast
___ e) south

22. A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

___ a) west
___ b) southeast
___ c) south
___ d) southwest
___ e) northwest

23. A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

___ a) northeast
___ b) south
___ c) southeast
___ d) northwest
___ e) north

24. A car is traveling west and slowing down. The acceleration is

___ a) zero
___ b) to the east
___ c) to the west

25. A car is traveling east and slowing down. The acceleration is

___ a) to the east
___ b) zero
___ c) to the west

26. A car is traveling east and speeding up. The acceleration is

___ a) to the west
___ b) to the east
___ c) zero

27. If you toss a coin into the air, the acceleration on the way up is

___ a) zero
___ b) up
___ c) down

28. A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

___ a) north
___ b) west
___ c) east
___ d) zero
___ e) south

29. A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

___ a) zero
___ b) south
___ c) north
___ d) west
___ e) east

30. As the Moon circles Earth, the acceleration of the Moon is

___ a) zero
___ b) in the same direction as the Moon's velocity
___ c) towards Earth
___ d) opposite the direction of the Moon's velocity
___ e) away from Earth

31. If you toss a coin into the air, the acceleration on the way down is

___ a) down
___ b) zero
___ c) up

32. These two pulses will collide and produce

___ a) negative interference
___ b) positive diffraction
___ c) positive interference
___ d) negative diffraction

33. These two pulses will collide and produce

___ a) positive interference
___ b) negative interference
___ c) positive diffraction
___ d) negative diffraction

34. These two pulses will collide and produce

___ a) positive diffraction
___ b) negative diffraction
___ c) positive interference
___ d) negative interference

35. Two signals (dashed) add to a solid

___ a) octave
___ b) fifth
___ c) dissonance

36. Two signals (dashed) add to a solid

___ a) fifth
___ b) octave
___ c) dissonance

37. Two signals (dashed) add to a solid

___ a) octave
___ b) fifth
___ c) dissonance

38. Why don't we hear beats when two different notes on a piano are played at the same time?

___ a) Echo usually stifles the beats
___ b) The beats happen so many times per second you can't hear them.
___ c) The note is over by the time the first beat is heard
___ d) Reverberation usually stifles the beats

39. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?

___ a) 60
___ b) 40
___ c) 50
___ d) 30
___ e) 20

40. If you start moving towards a source of sound, the pitch becomes

___ a) higher
___ b) unchanged
___ c) lower

41. If a source of sound is moving towards you, the pitch becomes

___ a) lower
___ b) higher
___ c) unchanged

42. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?

___ a) The difference in path lengths creates more reverberation.
___ b) The difference in path lengths creates more echo.
___ c) Rough walls make for a louder sound.

43. People don't usually perceive an echo when

___ a) it arrives at a lower pitch
___ b) it arrives at exactly the same pitch
___ c) it arrives at a higher pitch
___ d) it takes more than a tenth of a second after the original sound to arrive
___ e) it arrives less than a tenth of a second after the original sound

44. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,

___ a) the low density rope supports a wave with a higher speed
___ b) the low density rope supports a wave with a higher frequency
___ c) the low density rope supports a wave with a lower frequency
___ d) the low density rope supports a wave with a lower speed

45. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?

___ a) the wavelength gets longer
___ b) the wavelength gets shorter
___ c) the wavelength stays the same

46. When a wave is reflected off a stationary barrier, the reflected wave

___ a) has lower amplitude than the incident wave
___ b) has higher frequency than the incident wave
___ c) both of these are true

47. Comparing a typical church to a professional baseball stadium, the church is likely to have

___ a) neither reverberation nor echo
___ b) echo instead of reverberation
___ c) both reverberation and echo
___ d) reverberation instead of echo

48.
Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates
___ a) how a nearsighted person might see an object that is too close for comfort
___ b) how a farsighted person might see a distant object
___ c) how a farsighted person might see an object that is too close for comfort
___ d) how a nearsighted person might see a distant object

49.
Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates
___ a) how a nearsighted person might see a distant object
___ b) how a farsighted person might see an object that is too close for comfort
___ c) how a nearsighted person might see an object that is too close for comfort
___ d) how a farsighted person might see a distant object

50. In optics, normal means

___ a) parallel to the surface
___ b) to the left of the optical axis
___ c) perpendicular to the surface
___ d) to the right of the optical axis

51. The law of reflection applies to

___ a) curved surfaces
___ b) both flat and curved surfaces
___ c) only light in a vacuum
___ d) flat surfaces
___ e) telescopes but not microscopes

52. When light passes from air to glass

___ a) it does not bend
___ b) it bends away from the normal
___ c) it bends towards the normal
___ d) the frequency decreases
___ e) the frequency increases

53. When light passes from glass to air

___ a) it does not bend
___ b) it bends towards the normal
___ c) the frequency decreases
___ d) it bends away from the normal
___ e) the frequency increases

54. An important principle that allows fiber optics to work is

___ a) partial internal absorption
___ b) the invariance of the speed of light
___ c) total internal reflection
___ d) total external refraction
___ e) the Doppler shift

55. The focal point is where

___ a) rays meet whenever they are forming an image
___ b) rays meet whenever they pass through a lens
___ c) rays meet if they were parallel to the optical axis before striking a lens
___ d) rays meet if they are parallel to each other
___ e) the center of the lens

56. Which lens has the shorter focal length?

___ a)
___ b) They have the same focal lengh.
___ c)

57. If this represents the eye looking at an object, where is this object?

___ a) One focal length in front of the eye
___ b) directly in front of the eye (almost touching)
___ c) very far away
___ d) Two (of the other answers) are true
___ e) at infinity

58. After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

___ a) true
___ b) false

59. Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?

___ a)
___ b)
___ c)

60. Excepting cases where where quantum jumps in energy are induced in another object (i.e., using only the uncertainty principle), which would NOT put a classical particle into the quantum regime?

___ a) confinement to a small space
___ b) low mass
___ c) low speed
___ d) high speed

61. How does the Bohr atom differ from Newton's theory of planetary orbits?

___ a) planets make elliptical orbits while the electron makes circular orbits
___ b) The force between proton and electron is not attractive for the atom, but it is for planets and the sun.
___ c) The force between planets and the sun is not attractive for the atom, but it is for proton and electron.
___ d) electrons make elliptical orbits while planets make circular orbits

62. What are the units of Plank's constant?

___ a) all of the above
___ b) mass x velocity x distance
___ c) none of the above
___ d) energy x time
___ e) momentum x distance

63. What are the units of Plank's constant?

___ a) momentum x distance x mass
___ b) all of the above
___ c) energy x time
___ d) none of the above
___ e) mass x velocity

64. How would you describe Old Quantum Theory

___ a) complete but not self-consistent
___ b) self-consistent but not complete
___ c) neither complete nor self-consistent
___ d) complete and self-consistent

65. The first paper that introduced quantum mechanics was the study of

___ a) light
___ b) protons
___ c) energy
___ d) electrons

66. What are examples of energy?

___ a) mgh where m is mass, g is gravity, and h is height
___ b) heat
___ c) all of the above
___ d) ${\displaystyle {\frac {1}{2}}mv^{2}}$

67. What are examples of energy?

___ a) all of the above
___ b) momentum
___ c) ${\displaystyle {\frac {1}{2}}mv}$
___ d) heat

68. What was Plank's understanding of the significance of his work on blackbody radiation?

___ a) he knew it would someday win him a Nobel prize
___ b) he was afraid to publish it for fear of losing his reputation
___ c) the thought it was some sort of mathematical trick
___ d) he eventually convinced his dissertation committee that the theory was correct

69. What was "spooky" about Taylor's 1909 experiment with wave interference?

___ a) The light was dim, but it didn't matter because he was blind.
___ b) The light was so dim that only one photon at a time was near the slits.
___ c) The interference pattern mysteriously disappeared.
___ d) The light was so dim that the photoelectric effect couldn't occur

#### Key to HTW T1_Study-v1s1

1. Mr. Smith starts from rest and accelerates to 4 m/s in 3 seconds. How far did he travel?

+ a) 6.0 meters
- b) 5.0 meters
- c) 3.0 meters
- d) 4.0 meters
- e) 7.0 meters

2. Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

- a) 7.0 meters
- b) 8.0 meters
- c) 11.0 meters
+ d) 10.0 meters
- e) 9.0 meters

3. Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

+ a) 12.0 meters
- b) 10.0 meters
- c) 11.0 meters
- d) 8.0 meters
- e) 9.0 meters

4. Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 2 seconds. He then travels at this speed for an additional 1 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

+ a) 6.0 meters
- b) 5.0 meters
- c) 8.0 meters
- d) 9.0 meters
- e) 7.0 meters

5. Mr. Smith is driving at a speed of 4 m/s, when he slows down to a speed of 1 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- a) 9.0 meters
- b) 8.0 meters
- c) 7.0 meters
+ d) 10.0 meters
- e) 11.0 meters

6. Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- a) 23.0 meters
- b) 19.0 meters
- c) 22.0 meters
- d) 21.0 meters
+ e) 20.0 meters

7. Mr. Smith starts from rest and accelerates to 2 m/s in 3 seconds. How far did he travel?

+ a) 3.0 meters
- b) 4.0 meters
- c) 6.0 meters
- d) 7.0 meters
- e) 5.0 meters

8. Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- a) 11.0 meters
- b) 12.0 meters
- c) 10.0 meters
- d) 8.0 meters
+ e) 9.0 meters

9. Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- a) 20.0 meters
+ b) 16.0 meters
- c) 17.0 meters
- d) 19.0 meters
- e) 18.0 meters

10. Mr. Smith starts from rest and accelerates to 3 m/s in 2 seconds. How far did he travel?

- a) 2.0 meters
- b) 1.0 meters
- c) 4.0 meters
+ d) 3.0 meters
- e) 5.0 meters

11. Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

+ a) 24.0 meters
- b) 23.0 meters
- c) 26.0 meters
- d) 25.0 meters
- e) 27.0 meters

12. Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- a) 13.0 meters
+ b) 16.0 meters
- c) 17.0 meters
- d) 15.0 meters
- e) 14.0 meters

13. When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

- a) the cloth is more slippery when it is pulled quickly
+ b) the cloth is accelerating for such a brief time that there is little motion
- c) objects don't begin to accelerate until after the force has been applied

14. If you toss a coin into the air, the acceleration while it as its highest point is

+ a) down
- b) zero
- c) up

15. If you toss a coin into the air, the velocity on the way up is

- a) zero
+ b) up
- c) down

16. If you toss a coin into the air, the velocity on the way down is

- a) up
+ b) down
- c) zero

17. If you toss a coin into the air, the velocity while it as its highest point is

- a) down
+ b) zero
- c) up

18. A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

- a) northeast
+ b) northwest
- c) southwest
- d) south
- e) north

19. A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

- a) northwest
- b) north
- c) southwest
- d) south
+ e) northeast

20. A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

- a) northeast
- b) northwest
- c) southeast
+ d) north
- e) northeast

21. A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

- a) northwest
- b) southwest
+ c) north
- d) northeast
- e) south

22. A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

- a) west
- b) southeast
- c) south
+ d) southwest
- e) northwest

23. A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

- a) northeast
- b) south
+ c) southeast
- d) northwest
- e) north

24. A car is traveling west and slowing down. The acceleration is

- a) zero
+ b) to the east
- c) to the west

25. A car is traveling east and slowing down. The acceleration is

- a) to the east
- b) zero
+ c) to the west

26. A car is traveling east and speeding up. The acceleration is

- a) to the west
+ b) to the east
- c) zero

27. If you toss a coin into the air, the acceleration on the way up is

- a) zero
- b) up
+ c) down

28. A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

- a) north
+ b) west
- c) east
- d) zero
- e) south

29. A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

- a) zero
- b) south
- c) north
- d) west
+ e) east

30. As the Moon circles Earth, the acceleration of the Moon is

- a) zero
- b) in the same direction as the Moon's velocity
+ c) towards Earth
- d) opposite the direction of the Moon's velocity
- e) away from Earth

31. If you toss a coin into the air, the acceleration on the way down is

+ a) down
- b) zero
- c) up

32. These two pulses will collide and produce

- a) negative interference
- b) positive diffraction
+ c) positive interference
- d) negative diffraction

33. These two pulses will collide and produce

- a) positive interference
+ b) negative interference
- c) positive diffraction
- d) negative diffraction

34. These two pulses will collide and produce

- a) positive diffraction
- b) negative diffraction
+ c) positive interference
- d) negative interference

35. Two signals (dashed) add to a solid

+ a) octave
- b) fifth
- c) dissonance

36. Two signals (dashed) add to a solid

- a) fifth
- b) octave
+ c) dissonance

37. Two signals (dashed) add to a solid

- a) octave
+ b) fifth
- c) dissonance

38. Why don't we hear beats when two different notes on a piano are played at the same time?

- a) Echo usually stifles the beats
+ b) The beats happen so many times per second you can't hear them.
- c) The note is over by the time the first beat is heard
- d) Reverberation usually stifles the beats

39. A tuning fork with a frequency of 440 Hz is played simultaneously with a tuning fork of 442 Hz. How many beats are heard in 10 seconds?

- a) 60
- b) 40
- c) 50
- d) 30
+ e) 20

40. If you start moving towards a source of sound, the pitch becomes

+ a) higher
- b) unchanged
- c) lower

41. If a source of sound is moving towards you, the pitch becomes

- a) lower
+ b) higher
- c) unchanged

42. Why do rough walls give a concert hall a “fuller” sound, compared to smooth walls?

+ a) The difference in path lengths creates more reverberation.
- b) The difference in path lengths creates more echo.
- c) Rough walls make for a louder sound.

43. People don't usually perceive an echo when

- a) it arrives at a lower pitch
- b) it arrives at exactly the same pitch
- c) it arrives at a higher pitch
- d) it takes more than a tenth of a second after the original sound to arrive
+ e) it arrives less than a tenth of a second after the original sound

44. A dense rope is connected to a rope with less density (i.e. fewer kilograms per meter). If the rope is stretched and a wave is sent along high density rope,

+ a) the low density rope supports a wave with a higher speed
- b) the low density rope supports a wave with a higher frequency
- c) the low density rope supports a wave with a lower frequency
- d) the low density rope supports a wave with a lower speed

45. What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope?

+ a) the wavelength gets longer
- b) the wavelength gets shorter
- c) the wavelength stays the same

46. When a wave is reflected off a stationary barrier, the reflected wave

+ a) has lower amplitude than the incident wave
- b) has higher frequency than the incident wave
- c) both of these are true

47. Comparing a typical church to a professional baseball stadium, the church is likely to have

- a) neither reverberation nor echo
- b) echo instead of reverberation
- c) both reverberation and echo
+ d) reverberation instead of echo

48.
Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates
- a) how a nearsighted person might see an object that is too close for comfort
- b) how a farsighted person might see a distant object
- c) how a farsighted person might see an object that is too close for comfort
+ d) how a nearsighted person might see a distant object

49.
Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates
- a) how a nearsighted person might see a distant object
+ b) how a farsighted person might see an object that is too close for comfort
- c) how a nearsighted person might see an object that is too close for comfort
- d) how a farsighted person might see a distant object

50. In optics, normal means

- a) parallel to the surface
- b) to the left of the optical axis
+ c) perpendicular to the surface
- d) to the right of the optical axis

51. The law of reflection applies to

- a) curved surfaces
+ b) both flat and curved surfaces
- c) only light in a vacuum
- d) flat surfaces
- e) telescopes but not microscopes

52. When light passes from air to glass

- a) it does not bend
- b) it bends away from the normal
+ c) it bends towards the normal
- d) the frequency decreases
- e) the frequency increases

53. When light passes from glass to air

- a) it does not bend
- b) it bends towards the normal
- c) the frequency decreases
+ d) it bends away from the normal
- e) the frequency increases

54. An important principle that allows fiber optics to work is

- a) partial internal absorption
- b) the invariance of the speed of light
+ c) total internal reflection
- d) total external refraction
- e) the Doppler shift

55. The focal point is where

- a) rays meet whenever they are forming an image
- b) rays meet whenever they pass through a lens
+ c) rays meet if they were parallel to the optical axis before striking a lens
- d) rays meet if they are parallel to each other
- e) the center of the lens

56. Which lens has the shorter focal length?

+ a)
- b) They have the same focal lengh.
- c)

57. If this represents the eye looking at an object, where is this object?

- a) One focal length in front of the eye
- b) directly in front of the eye (almost touching)
- c) very far away
+ d) Two (of the other answers) are true
- e) at infinity

58. After passing through a the lens of a camera or the eye, the focal point is defined as where the rays meet.

- a) true
+ b) false

59. Mr. Smith is gazing at something as shown in the figure to the left. Suppose he does not refocus, but attempts to stare at the star shown in the figures below. Which diagram depicts how the rays from the star would travel if he does not refocus?

+ a)
- b)
- c)

60. Excepting cases where where quantum jumps in energy are induced in another object (i.e., using only the uncertainty principle), which would NOT put a classical particle into the quantum regime?

- a) confinement to a small space
- b) low mass
- c) low speed
+ d) high speed

61. How does the Bohr atom differ from Newton's theory of planetary orbits?

+ a) planets make elliptical orbits while the electron makes circular orbits
- b) The force between proton and electron is not attractive for the atom, but it is for planets and the sun.
- c) The force between planets and the sun is not attractive for the atom, but it is for proton and electron.
- d) electrons make elliptical orbits while planets make circular orbits

62. What are the units of Plank's constant?

+ a) all of the above
- b) mass x velocity x distance
- c) none of the above
- d) energy x time
- e) momentum x distance

63. What are the units of Plank's constant?

- a) momentum x distance x mass
+ b) all of the above
- c) energy x time
- d) none of the above
- e) mass x velocity

64. How would you describe Old Quantum Theory

- a) complete but not self-consistent
- b) self-consistent but not complete
+ c) neither complete nor self-consistent
- d) complete and self-consistent

65. The first paper that introduced quantum mechanics was the study of

+ a) light
- b) protons
- c) energy
- d) electrons

66. What are examples of energy?

- a) mgh where m is mass, g is gravity, and h is height
- b) heat
+ c) all of the above
- d) ${\displaystyle {\frac {1}{2}}mv^{2}}$

67. What are examples of energy?

+ a) all of the above
- b) momentum
- c) ${\displaystyle {\frac {1}{2}}mv}$
- d) heat

68. What was Plank's understanding of the significance of his work on blackbody radiation?

- a) he knew it would someday win him a Nobel prize
- b) he was afraid to publish it for fear of losing his reputation
+ c) the thought it was some sort of mathematical trick
- d) he eventually convinced his dissertation committee that the theory was correct

69. What was "spooky" about Taylor's 1909 experiment with wave interference?

- a) The light was dim, but it didn't matter because he was blind.
+ b) The light was so dim that only one photon at a time was near the slits.
- c) The interference pattern mysteriously disappeared.
- d) The light was so dim that the photoelectric effect couldn't occur

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