Diffraction
- Created by: Emilyburkee
- Created on: 31-12-20 08:55
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- diffraction
- the spreading out of light when it passes through a slit
- monochromatic
- one wavelength
- coherent
- constant phase diff and same wavelength
- longer the wavelength the more diffraction
- experiment
- screen at distance D
- bands of fringes produced
- maxima = superposition and constructive interference
- minima = destructive interference
- bands of fringes produced
- S = slit seperation
- W= LAMMDA D / S
- screen at distance D
- Double slit
- intense central fringe with less intense maxima
- Single slit
- the central maxima is double the width and much more bright
- diffraction grating
- visible orders
- central maximum = 0th order
- nlammda=dsin angle
- d= slit width
- D for grating = lines per mm
- to find d take reciprocal
- many slits
- visible orders
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