Physics equations/25-Geometric Optics/Q:image

pe025OpticsConcepts

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1

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

	how a nearsighted person might see a distant object
	how a nearsighted person might see an object that is too close for comfort
	how a farsighted person might see an object that is too close for comfort
	how a farsighted person might see a distant object

2

Shown is a corrective lens by a person who needs glasses. This ray diagram illustrates

	how a nearsighted person might see a distant object
	how a farsighted person might see a distant object
	how a farsighted person might see an object that is too close for comfort
	how a nearsighted person might see an object that is too close for comfort

3 In optics, normal means

	to the left of the optical axis
	parallel to the surface
	perpendicular to the surface
	to the right of the optical axis

4 The law of reflection applies to

	only light in a vacuum
	telescopes but not microscopes
	curved surfaces
	both flat and curved surfaces
	flat surfaces

5 When light passes from air to glass

	the frequency decreases
	the frequency increases
	it bends away from the normal
	it bends towards the normal
	it does not bend

6 When light passes from glass to air

	it does not bend
	the frequency decreases
	the frequency increases
	it bends towards the normal
	it bends away from the normal

7 An important principle that allows fiber optics to work is

	the invariance of the speed of light
	total internal reflection
	total external refraction
	partial internal absorption
	the Doppler shift

8 The focal point is where

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