#### Question

In deriving the single slit diffraction pattern, it was stated that the intensity is zero at angles of *n**λ**/a*. Justify this by suitably dividing the slit to bring out the cancellation.

#### Solution

Consider that a single slit of width *d* is divided into *n* smaller slits.

∴Width of each slit, `d' = d/n`

Angle of diffraction is given by the relation,

`theta = (d/d lambda)/d = lambda/d`

Now, each of these infinitesimally small slit sends zero intensity in direction*θ*. Hence, the combination of these slits will give zero intensity.

Is there an error in this question or solution?

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Solution In Deriving the Single Slit Diffraction Pattern, It Was Stated that the Intensity is Zero at Angles of Nλ/A. Justify this by Suitably Dividing the Slit to Bring Out the Cancellation. Concept: Diffraction - Seeing the Single Slit Diffraction Pattern.

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