Chapter 15

Question 1

the angle of incidence equals the angle of ____

Answer 1

refraction

Question 2

when a refracted ray lies along the boundary between two substances, the angle of incidence is the ______

Answer 2

critical angle

Question 3

total internal reflection can happen only when a light ray travels from one material into another with a _____ index of refraction

Answer 3

normal

Question 4

when a ray of light passes from water into air, it is bent _____ the normal

Answer 4

toward

Question 5

the number that compares the speed of light in a material with the speed of light “c” is the _____

Answer 5

index of refraction

Question 6

if the angle of incidence is greater than the critical angle you would expect to see ____

Answer 6

acceleration

Question 7

fiber optics is based on the concept of _____

Answer 7

total inward reflection

Question 8

when a light hits a piece of glass you usually see a small _____

Answer 8

reflection

Question 9

a raindrop produces a rainbow because each color of light has a different _____ in water

Answer 9

index of refraction

Question 10

all angles are measured from the ______

Answer 10

normal