Question

A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern ______ 

विकल्प

• decreases with the decrease of slitwidth

• decreases with the increase of slitwidth

• increase with the increase of slitwidth

• may increase or decrease

Answer 1

A parallel beam of monochromatic light falls normally on a single narrow slit. The angular width of the central maximum in the resulting diffraction pattern decreases with the increase of slitwidth.

Explanation:

X = `(2lambdaD)/a`, X will decrease if a increases