Diffraction gratings

Question 1

Diffraction meaning?

Answer 1

Tendency of a wave to spread out in all directions

Question 2

Superposition meaning?

Answer 2

Adding together wave displacements that occur whyen waves overlap.

Question 3

Path difference meaning?

Answer 3

Difference in length between 2 rays

Question 4

Interference pattern meaning?

Answer 4

opposite of superposition. stationary pattern caused by waves travelling in different directions

Question 5

Coherent meaning?

Answer 5

waves with the same frequency, wavelength