First slide

Diffraction of light-Wave Optics

Question

In a diffraction pattern by a wire, on increasing diameter of wire, fringe width

Easy

A

Decreases
B

Increases
C

Remains unchanged
D

Increasing or decreasing will depend on wavelength

Solution

$β = \frac{λ . D}{d} w here D = distance of screen from wire, d = diameter of wire$

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