In a single slit diffraction of light of wavelength $\lambda$ by a slit of width $e$, the size of the central maximum on a screen at a distance $b$ is

Question

Dr. Abubacker · Accepted Answer

(c) The direction in which the first minima occurs is $	heta$ (say). Then $e\sin	heta = \lambda$ or $e	heta = \lambda$ or, $	heta = \frac{\lambda}{e}$
$(\because	heta = \sin	heta\ $when$\ 	heta\ $small)
Width of the central maximum $= 2b	heta + e = 2b.\frac{\lambda}{e} + e$

Q. In a single slit diffraction of light of wavelength $\lambda$ by a slit of width $e$, the size of the central maximum on a screen at a distance $b$ is

Explanation

Reviewed by Dr. Abubacker

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