Interference and Diffraction

Question 1

Diffraction

Answer 1

The bending of waves as they pass through a gap

Question 2

When waves pass through a gap similar to their wavelength

Answer 2

Diffraction is bigger

Question 3

Central Maximum

Answer 3

Biggest band of wave in a diffraction grating

Question 4

Subsidiary Maxima

Answer 4

Narrower fainter bands of waves in a diffraction grating

Question 5

minimum (diffraction gratings)

Answer 5

dark bands in a diffraction grating where destructive interference has happened

Question 6

Superposition

Answer 6

Constructive interference

Question 7

interference maxima

Answer 7

Constructive interference

Path difference = (whole number, n) x wavelength

Path difference must be whole numbers

Question 8

Interference minima

Answer 8

Destructive interference

Path difference = (whole number, n) x 0.5wavelength

Path difference must be odd numbers of half wavelengths

Question 9

Path difference

Answer 9

The difference between the length of two wave’s path

Question 10

Young’s Double Slit Experiment

Answer 10

Passed wavelength through two slits to show interference of light

Question 11

Interference

Answer 11

The combination of two waves to form constructive or destructive interference

Question 12

Diffraction grating equation

Answer 12

(number of lines per mm) x wavelength = (grating spacing) x sin(angle)

d = 1/N