Question

Diffraction gratings with 6,000 lines per centimeter are readily available. Suppose you have one, and you send a beam of white light through it to a screen 2.00 m away. Find the angles for the second-order diffraction of the shortest and longest wavelengths of visible light (380 and 760 nm).

For the above problem with the diffraction gratings with 6,000 lines per centimeter through which you sent a beam of white light to a screen 2.00 m away, what is the distance between the ends of the rainbow of this visible light produced on the screen for second-order interference?

Answer 1

The space between slit is

then

here n = 2 then

for shortest wavelength

for longest wavelength

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