Aphysics instructor wants to project a spectrum of visible-light colors from 400 nm to 700 nm as part of a classroom demonstration. she shines a beam of white light through a diffraction grating that has 700 lines per mm, projecting a pattern on a screen 2.9 m behind the grating. how wide is the spectrum corresponding to m=1?

Explanation:

Given

Distance of screen from light source

we know in slit Experiment

, where =angle between the path and a line from the slits to the screen

and

where y is the position of First maxima corresponding

calculations for  

for n=1

Spectrum Width

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hope this you out ^w^