question_answer

If\[{{I}_{0}}\]is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled?                                  [AIEEE 2005]

A)       \[2{{I}_{0}}\]

B) \[4{{I}_{0}}\]   

C) \[{{I}_{0}}\]

D) \[\frac{{{I}_{0}}}{2}\]

Correct Answer: C

Solution :

[c] Hence, intensity can be given by

and

For principal maximum,

Hence, intensity will remain same as