Physics Practice Problems Diffraction Practice Problems Solution: The human eye can readily detect wavelengths from ...

Solution: The human eye can readily detect wavelengths from about 400 nm to 700 nm. If white light illuminates a diffraction grating having 750 lines/mm, over what range of angles does the visible m = 1 spectrum extend?

Problem

The human eye can readily detect wavelengths from about 400 nm to 700 nm. If white light illuminates a diffraction grating having 750 lines/mm, over what range of angles does the visible m = 1 spectrum extend?

Solution

The condition for constructive interference is given as:

d sin θ=mλ

Therefore, the angle θ becomes:

θ=sin-1(mλd)

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