Absorption, Reflection, Refraction, Angles of Incidence, Refraction, and Deviation Flashcards
Define “Absorption”
in terms of light and lenses - when a ray of light enters a lens, some of the light will not completely travel through the lens
Define “Angle of Deviation”
The change of the angle of a ray of light from its original path, usually from passing through a different material
Define “Diffuse Reflection”
A reflection from a rough surface; does not produce an image
Define “angle of incidence”
The angle which a ray of light makes with the surface of a refracting medium
Define “reflection”
The return of light waves from a surface; produces an image
Define “refraction”
The bending of light from one medium to another
Define “angle of refraction”
The angle created when a ray of light passes from one medium to another
Define “specular reflection”
The forming of a clear image when light strikes a surface
Why is a red pencil red?
It reflects red rays and absorbs all other rays of visible light
Why is the blacktop black?
It absorbs ALL rays of visible light
If a light beam passes through a green sunglass lens, why will the exiting light be green?
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, what happens to the ray of light if the ray is PERPENDICULAR to the surface?
It slows down but does not change direction. It is not displaced or deviated.
When a ray of light travels from air into water, what happens to the ray of light if the ray is NOT PERPENDICULAR to the surface?
It slows down and changes direction towards the normal. It deviates from its original path.
When a ray of light travels from water to air, what happens to the ray of light if the ray is PERPENDICULAR to the surface?
It speeds up but does not change direction.
When a ray of light travels from water to air, what happens to the ray of light if the ray is NOT PERPENDICULAR to the surface?
It speeds up and changes direction away the normal. It deviates from its original path.
