interference and diffraction summary

single slit diffraction

double slit diffraction

diffraction grating

grating spectroscope

number of slits: 1

number of slits: 2

number of slits: 1

number of slits: 100,000 per cm

width and spacing: not equal

width and spacing: equal

width and spacing: equal

width and spacing: not equal

interference pattern

monochromatic light

polychromatic light

bright central band (constructive)

dimmer, narrower bands on either sides (destructive)

a combination of patterns of all the colors

interference pattern

monochromatic light

polychromatic light

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