A coherent parallel beam of light of wavelength 5000 is incident normally on the plane of slits The slit S is covered with a

Question

A coherent parallel beam of light of wavelength 5000 is incident normally on the plane of slits The slit S is covered with a slab of refractive index 1 5 and thickness t 4 105m as shown The separation between the slits is d 1 mm and the separation between the plane of slits and screen is D 1m Then the position of the central maxima formed on the screen is A 1 cm above point O B 2 cm above point O C 1 cm below point O D 2 cm below point O Hs 1 5 S Lt 4 x 10 m S D 1m scre

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