4. Superposition and Interface

Question 1

What is Superposition?

Answer 1

Superposition is the process that occurs when two or more waves pass through each other, increasing, or decreasing the displacement of the wave.

Question 2

What are the conditions for superposition?

Answer 2

The waves have to be of the same type and be Coherent.

Question 3

What does it mean for a wave to be Coherent with another?

Answer 3

They must have the same frequency and a constant phase difference.

Question 4

What are the two types of interference which can occur from superposition?

Answer 4

Constructive and Destructive interference

Question 5

What is Constructive Interference?

Answer 5

Constructive interference is what occurs if their displacements are in the same direction, it causes the displacements to combine to give a bigger displacement, so a crest would get higher, while a trough would get deeper

Question 6

What is Destructive Interference?

Answer 6

Destructive Interference is what occurs if their displacements are in opposite directions, it causes the displacements to combine to give a smaller displacement, so a crest/trough would flatten out.

Question 7

What is Total Destructive Interference?

Answer 7

Total Destructive Interference Occurs when two waves of equal and Opposite displacements meet, they cancel each other out completely.