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 wavelength of the source is made 5/2 times, what happens to the width of the third secondary maxima?

becomes 5 times

width ∝ 2λ