Two beams of planar wavefront 633-nm coherent light whose, Ask an Expert

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Two beams of planar wavefront, 633-nm coherent light, whose directions are 120o apart, strike a photographic emulsion of index 1.6.

a) Sketch the arrangement, showing the orientation of the planes of constructive interference within the emulsion.
b) Determine the planar spacing of the developed volume hologram
c) At what angle of incidence relative to the silver planes is a wavelength of 450 nm reinforced?

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