diffraction

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9 Terms

1
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what is diffraction

when a wave hits an obstacle , it bends around the obstacle

2
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give examples of diffraction

  1. hearing noise from the other room

  2. waves bend around small boats

3
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every point on a wavefront is a

wavelet

4
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what is fresnel - huygens prnciple of secondary wavelets

every point on a wavefront acts as a secondary source of a spherical wavefront of the same frequency

5
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what is the difference between franhofer and fresnel diffraction patterns

fraunhofer the souce of light is an infitine distance from the obstacle fresnel is finite

6
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how is fraunhofer diffraction shown

adjustable slit

7
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most optical appliances have

circular aperture

8
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what is an airy disk

An Airy disk is the pattern of light that forms when a point source of light

9
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what is the formula for rayleighs criterion

θ =1.22 x λ​ / Diameter of aperture