# Interference and Diffraction Flashcards

1
Q

Diffraction

A

The bending of waves as they pass through a gap

2
Q

When waves pass through a gap similar to their wavelength

A

Diffraction is bigger

3
Q

Central Maximum

A

Biggest band of wave in a diffraction grating

4
Q

Subsidiary Maxima

A

Narrower fainter bands of waves in a diffraction grating

5
Q

minimum (diffraction gratings)

A

dark bands in a diffraction grating where destructive interference has happened

6
Q

Superposition

A

Constructive interference

7
Q

interference maxima

A

Constructive interference

Path difference = (whole number, n) x wavelength

Path difference must be whole numbers

8
Q

Interference minima

A

Destructive interference

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

Path difference must be odd numbers of half wavelengths

9
Q

Path difference

A

The difference between the length of two wave’s path

10
Q

Young’s Double Slit Experiment

A

Passed wavelength through two slits to show interference of light

11
Q

Interference

A

The combination of two waves to form constructive or destructive interference

12
Q

Diffraction grating equation

A

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

d = 1/N