Question

In a diffraction pattern by a wire, on increasing diameter of wire, fringe width
A. (a) Decreases
B. (b) Increases
C. (c) Remains unchanged
D. (d) Increasing or decreasing will depend on wavelength

Answer 1

Correct Answer - A
`beta=(lambdaD)/(d)` where D=distance of screen from wire, d=diameter of wire