Case : Read the passage and answer the question(s).

If we look clearly at the shadow cast by an opaque object, close to the region of geometrical shadow, there are alternate dark and bright regions. This happens due to a particular phenomenon. It is a general characteristic exhibited by all types of waves, be it sound waves, light waves, water waves or matter waves.

If the slit width is made thrice, what happens to the width of the central maximum?

it becomes 1/3 times

The width of the central maximum is :

β_ο = 2λD/a

λ : wavelength of the light

D : distance of the slit from the screen

a : width of the slit