A thick sheet of transparent plastic sits on top of the horizontal surface of a block of glass. For a ray traveling in the glass, the critical angle at the glass–plastic interface is 48.6°and the wavelength of the light in the glass is 350 nm. For an incident angle of 40.0°in the glass, what is the wavelength of the light after it refracts into the plastic?

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A: Solution:-

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A: