A `0.02 cm` wide slit is illuminated at normal incidence by light having
Channel: Doubtnut
Date: 2020-08-02

A `0.02 cm` wide slit is illuminated at normal incidence by light having wavelength `6 xx 10^(-7)m`.  (i) Find the width of the central band maximum on the screen which is `1 m` away from slit.  (ii) What would be the width of central maximum, if the apparatus is immersed in water whose refractive index is `4//3` ?