A beam of light from a laser hits a grid with the grid constant of 1.67 microns. Behind the grid, 5 rays can be observed. The angle between the outermost rays was measured to 94.1 degrees. Calculate the wavelength of the laser light.
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Expert's answer
2020-04-22T10:02:36-0400
n = 5
angle("\\theta") = 94.1o
d = 1.67 microns = 1.67 × 10−6 m
dsin("\\theta") = n × "\\lambda"
λ = dsin("\\theta") / n = (1.67 × 10−6 × sin(94.1)) / 5 = 0.33 × 10-6 m
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