The Diffraction Grating
 

The Diffraction Grating problem 12


A parallel beam of light of wavelength is incident normally on a diffraction grating. The distance between adjacent slits in the grating is . A screen is placed parallel to the grating, at a distance of from the grating. Third-order diffraction maxima are observed at the two ends of the screen, as shown below.




What is the distance between the two ends of the screen?










 

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