NAO Volume 2 Exam Questions and
Answers
Absorption - ANSWER-in terms of light and lens- when a ray of light enters a lens some of the light
will not completely travel through the lens
Deviation (Angle of) - ANSWER-the angle a ray of light is changed from its original path
Diffuse Relection - A...
Why is a red pencil red? - ANSWER✔✔-It reflects red rays back toward the eye and absorbs all the other
rays of visible light
Why is the blacktop black? - ANSWER✔✔-It does not reflect any rays back toward your eye; rather it
absorbs them all
If a light beam passes through a green sunglasses lens, why will the exciting light be green? -
ANSWER✔✔-The green rays are refracted through the lens and all other color rays are absorbed by the
pigments in the lens material
When a ray of light travels from air into water (which is denser than air) what happens to the ray of light
if the ray is perpendicular to the surface? - ANSWER✔✔-If the ray is perpendicular to the surface it slows
down but does not change direction; it is not deviated or displaced
When a ray of light travels from air into water (which is denser than air) what happens to the ray of light
if the ray is not perpendicular to the surface? - ANSWER✔✔-If the ray is not perpendicular to the surface
it slows down and changes direction toward the normal; it is deviated from its original path
When a ray of light travels from water into air ( which is rarer than water) what happens to the ray of
light if the ray is perpendicular to the surface? - ANSWER✔✔-If the ray is perpendicular to the surface it
speeds up but does not change direction; it is not deviated or displaced
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