WaPNoL 2

Question 1

Principle of Superposition

Answer 1

“The resultant displacement of two or more waves at a point is equal to the vector sum of their individual displacements at that point”

Question 2

Maxima

Answer 2

Waves meet with 0 degrees phase difference, resulting in constructive superposition occurs producing a point/region of maximum amplitude.

Question 3

Minima

Answer 3

Waves meet with 180 degrees phase difference, resulting in destructive superposition occurs producing a point/region of minimum amplitude

Question 4

Plane polarisation

Answer 4

Transverse waves are restricted to oscillate in one plane only and at right angles to the direction of energy transfer.

Question 5

Diffraction

Answer 5

Spreading of a wave through a gap or around an obstacle. Maximum diffraction occurs when gap width = wavelength

Question 6

Plane polarisation

Answer 6

When transverse waves are restricted to oscillate in one plane only, and at right angles to the direction of energy transfer.

Question 7

Radiation flux / Intensity

Answer 7

The amount of power received per unit area

Question 8

Work Function

Answer 8

The minimum energy needed to free a ‘delocalised’ electron from the surface of a metal

Question 9

Photon

Answer 9

The ‘packet’ of energy carried by each electromagnetic wave

Question 10

Ground state

Answer 10

The most relaxed and lowest energy state