Optics Answers

If the sun is 150 million km away from the earth, how long does it take sunlight to reach the earth
0.5 s
1500 s
45 s
500 s

Where is the image located when an object is 60 cm from a convex mirror with a focal length of20 cm?
15 cm behind
30 cm behind
60 cm behind
15 cm in front

What type of image is formed when an object is placed at a distance of 1.5 focal lengths from a convex mirror?
erect and virtual
inverted and virtual
erect and real
inverted and real

The image formed by a bathroom mirror is
erect and virtual
erect and real
inverted and virtual
inverted and real

The focal length of a curved mirror is -------- the radius of the spherical surface.
twice
equal to
half
one-quater

hat type of mirror would you use to produce a magnified image of your face?
plane
concave
convex
diffuse

If rays of light parallel and close to the principal axis are incident on a --------- mirror, they converge to a point after reflection from the mirror
plane
convex
concave
diffuse

If a 4-m-tall child stands 2 m in front of a vertical plane mirror, the image of the child will be ------- m tall
1
2
3
4

If you stand 2 m in front of a plane mirror, how far from you is your image?
1 m
2 m
3 m
4 m

The law of reflection states that
light travels in a straight line
light must be reflected into our eyes to be seen
the angle of reflection is equal to the angle of incidence
light striking a rough surface is scattered in all directions