NAO Volume 2 || Possible Questions Accurately Answered.
Absorption correct answers 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 answers the angle a ray of light is changed from its original path
Diffuse Relection correct answers a reflection from a rough surface- the reflection does not
produce a clear image
Incidence (Angle of) correct answers the angle which a ray of light makes the surface of a
refracting medium
Reflection correct answers the return of light waves from a surface the production of an image
Refraction correct answers the bending of light when going from one medium into another
Refraction (Angle of) correct answers the angle created when a ray of light passes from one
medium into another
Specular Reflection correct answers the forming of a clear image when light strikes a surface
Why is a red pencil red? correct answers It reflects red rays back toward the eye and absorbs all
the other rays of visible light
Why is the blacktop black? correct answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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
answers absorbed, reflected, refracted
What is the difference between a high index lens and a aspheric lens correct answers high index
refers to the material of the lens; aspheric refers to the surface design of the lens
What is transposition? correct answers is the changing of a precription from plus cylinder to
minus cylinder or the other way around
Absorption correct answers 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 answers the angle a ray of light is changed from its original path
Diffuse Relection correct answers a reflection from a rough surface- the reflection does not
produce a clear image
Incidence (Angle of) correct answers the angle which a ray of light makes the surface of a
refracting medium
Reflection correct answers the return of light waves from a surface the production of an image
Refraction correct answers the bending of light when going from one medium into another
Refraction (Angle of) correct answers the angle created when a ray of light passes from one
medium into another
Specular Reflection correct answers the forming of a clear image when light strikes a surface
Why is a red pencil red? correct answers It reflects red rays back toward the eye and absorbs all
the other rays of visible light
Why is the blacktop black? correct answers 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 answers 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 answers 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 answers 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 answers 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 answers 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 answers 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
answers absorbed, reflected, refracted
What is the difference between a high index lens and a aspheric lens correct answers high index
refers to the material of the lens; aspheric refers to the surface design of the lens
What is transposition? correct answers is the changing of a precription from plus cylinder to
minus cylinder or the other way around
