Combining waves (6)

Question 1

Superposition

Answer 1

is when two waves of the same type overlap and interact. The displacement of the medium, where the waves overlap, is the vector sum of the two wave displacements.

Question 2

Interference

Answer 2

is the name given to the superposition of waves from two coherent sources of waves. Interference is constructive if waves are in phase, or destructive if waves are in antiphase.

Question 3

Coherent

Answer 3

two waves are coherent when they have a fixed phase difference and have the same frequency.

Question 4

Stationary (standing) wave

Answer 4

is a wave formed by the superposition of two progressive waves of the same frequency and amplitude travelling in opposite directions.

Question 5

Node

Answer 5

a point of zero amplitude on a stationary wave.

Question 6

Antinode

Answer 6

a point of maximum amplitude on a stationary wave.

Question 7

Harmonic

Answer 7

a mode of vibration that is a multiple of the first harmonic.