*Question*

The diagram shows the diffraction pattern for light passing through a single slit.

What is \(\frac{\text{wavelength of light}}{\text{width of slit}}\)

A 0.01

B. 0.02

C 1

D 2

**Answer/Explanation**

Ans: A

The graph for the variation of intensity as a function of sinθ is as follows :

The width of the central maxima is

and angular width of central maxima is

.

Hence \(\frac{\lambda}{b}=\) diffraction angle \(\theta\)

Hence as per given value in graph

\(\frac{\lambda}{b}= 10^{-2} = 0.001\)