Thin film of oil thickness t is floating on water. Oilhas index of refraction =1

Question

Thin film of oil thickness t is floating on water. Oilhas index of refraction =1.4 Air is above oil Whenviewed from air in direction normal to surface there isconstructive interference of reflected red light with wave length675 nm Find minimum thickness t of oil film which will giveconstructive interference of reflected light with wavelenght 675nm Please explain reasoning and formulas Thin film of oil thickness t is floating on water. Oilhas index of refraction =1.4 Air is above oil Whenviewed from air in direction normal to surface there isconstructive interference of reflected red light with wave length675 nm Find minimum thickness t of oil film which will giveconstructive interference of reflected light with wavelenght 675nm Please explain reasoning and formulas

Explanation / Answer

120.5nm

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