Waves

Question 1

What is the phase difference on where constructive interference occurs?

Answer 1

0, 360 degrees. 2 pi

Question 2

Phase difference at destructive interference

Answer 2

180 degrees, pi

Question 3

Phase difference

Answer 3

The amount one wave lags behind another.

Question 4

In phase waves

Answer 4

If particles in the waves are oscillating perfectly in step with each other ( reach maximum positive displacement at the same tim) they are in phase. Phase difference 0

Question 5

Amplitude

Answer 5

Maximum magnitude of the displacement of a wave from its equilibrium position.

Question 6

Coherent

Answer 6

Constant phase difference

Question 7

Interference

Answer 7

When two waves meet at a point and there is a change in the overall displacement .

Question 8

Path difference

Answer 8

The difference in distances of two waves having travelled from their source.

Question 9

What is the path difference for anti nodes and nodes for the double slit experiment.

Answer 9

Node = constructive interference = in phase. If the waves are in phase then the path difference must be a whole number (n)
Antinode = destructive interference = anti phase. If the waves are in anti phase then the path difference must be an odd number of halves. (n+1/2).

Question 10

Transverse wave

Answer 10

Oscillation is perpendicular to the direction of travel.

Question 11

Longitudinal

Answer 11

Oscillations in the same direction of travel.

Question 12

Intensity

Answer 12

The rate of flow of energy per unit area at right angles to the direction of travel of the wave.