Monochromatic lights of wavelengths 420 nm and 540 nm are incident simultaneously and normally on a double slit apparatus with slit separation of 0.0756 mm and screen is at a distance of 1m. The total number of dark fringes due to both wavelenths on the screen is

Monochromatic lights of wavelengths 420 nm and 540 nm are incident sim

1.	Monochromatic lights of wavelengths 420 nm and 540 nm are incident simultaneously and normally on a double slit apparatus with slit separation of 0.0756 mm and screen is at a distance of 1m. The total number of dark fringes due to both wavelenths on the screen is
Answer» 360 280 19 38 Answer :D

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Monochromatic lights of wavelengths 420 nm and 540 nm are incident simultaneously and normally on a double slit apparatus with slit separation of 0.0756 mm and screen is at a distance of 1m. The total number of dark fringes due to both wavelenths on the screen is

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