a 0.02 m wide slit is illumijnated at normal incidence by light of wavelength 6000 Å (i) Find the width of the central maximum band on the screen plac
a 0.02 m wide slit is illumijnated at normal incidence by light of wavelength 6000 Å (i) Find the width of the central maximum band on the screen placed 1 m awayb from the slit. (ii) What should br the fringe width if the appratus Is impressed in water whose refractive index is 4/3?
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