Monochromatic light with wavelength 420 nm is incident on a slit with width 0.050 mm. The distance from the slit to a screen is 3.5 m. Consider a point on the screen 2.2 cm from the central maximum. Calculate (a) `theta` for that point, (b) `alpha`, and (c) the ratio of the intensity at that point to the intensity at the central maximum.

Explanation

(a) `0.36^(@)`, (b) `2.35 rad ~~ 2.4 rad`, (c) 0.091