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NAO Volume 2 questions well answered already passed
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NAO Volume 2 questions well answered already passed
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NAO Volume 2 questions well answeredalready passed
Absorption - correct 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) - correct answer ✔✔the angle a ray of light is changed from its original path
Diffuse Reelection - correct answer ✔✔a reflection from a rough surface- the reflection does not
produce a clear image
Incidence (Angle of) - correct answer ✔✔the angle which a ray of light makes the surface of a refracting
medium
Reflection - correct answer ✔✔the return of light waves from a surface the production of an image
Refraction - correct answer ✔✔the bending of light when going from one medium into another
Refraction (Angle of) - correct answer ✔✔the angle created when a ray of light passes from one medium
into another
Specular Reflection - correct answer ✔✔the forming of a clear image when light strikes a surface
Why is a red pencil red? - correct answer ✔✔It reflects red rays back toward the eye and absorbs all the
other rays of visible light
Why is the blacktop black? - correct 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? - correct
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? - correct 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? - correct 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? - correct answer ✔✔If the ray is perpendicular to the
surface it speeds up but does not change direction; it is not deviated or displaced
hen a ray of light travels from water into air ( which is rarer than water) what happens to the ray of light
if the ray of light is not perpendicular to the surface? - correct answer ✔✔If the ray is not perpendicular
to the surface it speeds up and changes direction away from the normal; it is deviated from its original
path
What does critical angle mean? - correct answer ✔✔a light ray leaving a denser material is rarer material
that is at an angle of normal that results in it traveling parallel to the surface of the material. If the angle
of incidence is greater than the critical angle the ray will reflect inside the material and will not exit into
the rarer material
What are the three things that can happen to a ray of light when it passes through a lens? - correct
answer ✔✔absorbed, reflected, refracted
What is the difference between a high index lens and a aspheric lens - correct answer ✔✔high index
refers to the material of the lens; aspheric refers to the surface design of the lens
What is transposition? - correct answer ✔✔is the changing of a precription from plus cylinder to minus
cylinder or the other way around
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