Chapter 18 Flashcards
Rays reflected in many different directions produce a _____ ____
Diffuse reflection
If a beam of light falls on a very smooth surface, the rays undergo ______ _____
Regular reflection
Light changes direction, or _____, as it moves from one medium to another if the angle of incidence is ____ ____ ____
Bends; not zero degree
The change in direction or bending of light at the boundary between two media is called _____
Refraction
The angle between the incident ray and a normal to the surface at the point of incidence is the _____ of _____
Angle of incidence
The angle between the refracted ray and the same normal is the _____ of _____
Angle of refraction
Refraction occurs only when the incident ray strikes the boundary ______ the ____ ____ at an ____
Between the two media at an angle
As the ray enters a medium in which it travels more slowly, the refracted ray bends toward the _____
Normal
The angle of _____ is smaller than the angle of _____
Refraction; incidence
When a light ray passes into a medium in which it travels faster, the light ray refracts ____ from the ____
Away from the normal
The angle of _____ is larger than the angle of ____
Refraction; incidence
The property of a medium that determines the speed of light in that medium
Optical density
If a medium is optically dense, it _____ _____ more than a medium which is less optically dense
Slows light
_____ of _____ that travel from air to glass or any other medium more optically dense than air, are ______ toward the normal
Rays of light, refracted
As the angle of incidence increases, the angle of refraction ______
Increases
