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A laser beam of wavelength 630nm is directed normally at a diffraction grating with 300 lines per millimetre. Calculate the angle of diffraction of each of the first two orders.?
Wiki User
∙ 11y ago
1/(3*10^5) = 0.000003(recurring)
(630*10^-9)/0.000003(recurring)
=0.189
sin^-1(0.189)=10.9 degrees (first order)
10.9*2=21.8 degrees (second order)
Wiki User
∙ 11y ago
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