A diffraction grating has a spacing of 1.6 * 10^-6 meters. A beam of light is incident normally on the grating. The 1st order maximum makes an angle of 20 deg with the un-deviated beam. What is the wavelength of the incident light?
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Expert's answer
2018-10-05T14:36:09-0400
d sinθ=nλ 1.6 ∙ 〖10〗^(-6) sin20=(1)(λ) λ=550 nm.
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