Question 161: Waves Optics

Question

Light of wavelength $$550$$ $$nm$$ falls normally on a slit of width $$22.0 	imes {10^{ - 5}}$$ $$cm.$$ The angular position of the second minima from the central maximum will (in radians) :

Accepted Answer

Angular position of n
th
minima from central maxima,
sin $$	heta $$ = $${{n\lambda } \over a}$$
here n = 2
$$	herefore\,\,\,\,$$  sin $$	heta $$ = $${{2 	imes 550 	imes {{10}^{ - 9}}} \over {22 	imes {{10}^{ - 5}}}}$$ = $${1 \over 2}$$
$$	herefore\,\,\,$$ $$	heta $$ = $${\pi  \over 6}$$ rad.

Answer

$${\pi  \over {12}}$$

Answer

$${\pi  \over 8}$$

Answer

$${\pi  \over 6}$$

Answer

$${\pi  \over 4}$$

Waves Optics

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) :

Choose the correct answer: