White light is incident at an angle of 45 on a soap film 4x10^-5 cm thick.Find the wavelength of light in the visible spectrum which will be absent in the reflected light.Given R.I.=1.2 for soap film.
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A soap film of RI 1.33 & thickness 6×10−5 cm is viewed at angle of 350 to normal. Find the λs in the visible spectrum that will be absent from the reflected light. Visible λ range: 4000 – 7000A˚.
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