12.2 Interference

Question 1

When does constructive interference occur

Answer 1

When interfering waves are in phase / when waves that are interfering with one another are in phase

Question 2

Define interference

Answer 2

When 2 waves superpose ( overlap each other )

Question 3

What is the path difference between 2 points on a wave

Answer 3

The fraction of a wavelength by which one point is behind the other

Question 4

When does destructive interference occur

Answer 4

When the interfering waves are in antiphase ( when waves are oscillating completely out of phase with each other, one is at its max pos displacement/amplitude and the other is at to max neg displacement/amplitude )

Question 5

What is an interference pattern

Answer 5

A pattern of constructive and destructive interference formed as waves overlap

Question 6

Define in phase

Answer 6

Particles oscillating perfectly in time with each, as a result reaching their maximum positive displacement, are in phase