Light of wavelength $550$ $nm$ falls normally on a slit of width $22.0 \times {10^{ - 5}}$ $cm.$ The angular position of the second minima from the central maximum will (in radians) :
${\pi \over {12}}$
${\pi \over 8}$
${\pi \over 6}$
${\pi \over 4}$
Solution
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