# Physics equations/25-Geometric Optics/Q:image

## pe025OpticsConcepts

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