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How does the diffraction pattern from three narrow slits, change if the slits are finite width...

How does the diffraction pattern from three narrow slits, change if the slits are finite width rather than narrow

Science   Advanced-Physics   
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Answer #1

Hey there!

First let me show you how a diffraction pattern looks like for 3 slits.

It would appear that the central envelope would appear in a higher intensity.

But if the slit width is increased , you would notice that the diffraction pattern size increases and the intensity of the light decreases accordingly other than the central band. Hence we could say that the width of the slit is inversely proportional to the intensity of the diffraction pattern. This would result with a brighter central band and less intense bands at the sides as the width of the slit is kept increasing.

I hope the solution helps... Feel free to comment and discuss further... Cheers :)

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