Light containing a mixture of two wavelengths, 500 and 600 nm, is incident normally on a diffraction grating. It is desired (1) that the first and second maxima for each wavelength appear at u 30<-, (2) that the dispersion be as high as possible, and (3) that the third order for the 600 nm light be a missing order. (a) What should be the slit separation? (b) What is the smallest individual slit width that can be used? (c) For the values calculated in (a) and (b) and the light of wavelength 600 nm, what is the largest order of maxima produced by the grating?

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A: (a) The condition for minimum diffraction is a sin θ = mλa sin 90° = (1) (580 nm) a =580 nm  or…

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A: wavelength = 616 nm angles given by  sinθ=0.26 and sinθ=0.37 the fourth -order maxima are missing

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Q: Ight of wavelength 602 nm is incident normally on a diffraction grating. Two adjacent maxima occur…

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A: The order of the light,   The first minima in the diffraction pattern,

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.