A ray of light is incident at an angle of 45^@ (ralative to the normal) on a thin film of a liquid with an index of refraction of sqrt(2). Assuming that the medium of both sides of the film is air, find the minimum thickness of the film required for constructive interference in the reflected light for sodium light of wavelenght 600 nm.

A ray of light is incident at an angle of 45^@ (ralative to the normal

1.	A ray of light is incident at an angle of 45^@ (ralative to the normal) on a thin film of a liquid with an index of refraction of sqrt(2). Assuming that the medium of both sides of the film is air, find the minimum thickness of the film required for constructive interference in the reflected light for sodium light of wavelenght 600 nm.
Answer» 122 nm 212 nm 173 nm 320 nm Answer :A

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