Chapter 28 Review Questions

An oar partially immersed in water appears "broken" because of

(a) refraction

(b) diffraction

(c) polarization

(d) interference

(e) absorption

What type of mirror would you use to produce a magnified image of your face?

(a) flat

(b) concave

(c) convex

(d) you could use a concave or a convex mirror

What is (are) the purpose(s) of the wire screen in the door of a microwave oven?

(a) to absorb microwaves

(b) to allow you to see what's cooking

(c) to reflect microwaves

(d) all of the above

(e) only (b) and (c) 

A lingering sunset is

(a) a looming effect

(b) caused by an elliptical (oval) sun

(c) due to atmospheric refraction

(d) caused by reflections from the upper atmosphere

One way to reduce the problem of spherical aberration in a positive lens is to join a negative lens to it to form a compound lens.

(a) True

(b) False

When a beam of light emerges at a nonzero angle from water to air, the beam

(a) bends away from the normal

(b) continues in the same direction

(c) bends toward the normal

(d) changes frequency

(e) slows down

If you wish to take a picture of your image while standing 5 ft in front of a plane mirror, for what distance should you set your camera to provide the sharpest focus?

(a) 10 ft

(b) 5 ft

(c) 2.5 ft

(d) it can't be done