15.3

Question 1

Absorption:

Answer 1

the transfer of energy by a wave to the medium through which it travels.
The energy waves carry decreases as they travel through matter.

Question 2

Transmission

Answer 2

is the passage of light through an object.

Question 3

Reflection

Answer 3

is the bouncing of a wave off a surface (opposite of transmission).

Question 4

An imaginary line, perpendicular to a surface is called a _____. The angle between the direction of the incoming wave and the normal is the angle of ________. The angle between the direction of the reflected wave and the normal is the angle of reflection

Answer 4

1)normal
2)incidence

Question 5

law of reflection:

Answer 5

when a wave is reflected from a surface, the angle of reflection is equal to the angle of incidence.

Question 6

Refraction:

Answer 6

the change in direction of a wave that occurs as the wave changes speed when moving from one medium to another.

Question 7

Diffraction:

Answer 7

the change in direction of a wave when it travels by the edge of an object or through an opening

Question 8

Interference:

Answer 8

when waves that overlap combine, forming a new wave. However, after the waves travel through each other, they keep moving without having been changed.

Question 9

Constructive interference

Answer 9

occurs when crests overlap with crests and troughs overlap with troughs.

Question 10

Destructive interference

Answer 10

occurs when a crest of one wave overlaps the trough of another wave.

Question 11

If the two waves have the same ______, they cancel each other when their crests and troughs overlap.

Answer 11

amplitude

Question 12

Waves that seem to stand still when two other waves interact are called ______ ____.

Answer 12

standing waves