Thursday, February 09, 2006

Single Slit Diffraction

Monochromatic light of wavelength 633nm falls on a slit. If the between the first bright fringes on either side of the central maximum is 19.5 degrees, what is the slit width?

The maxima of a diffraction pattern occur at:


For the first maxima on either side of the centre, m=+1. If the angle between these two is 19.50, then the two maxima occur at θ=+(19.5/2)o



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