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What happen to focal length of …

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What happen to focal length of lens when it is immersed in water

    • Posted by Rashmi Shrivastava 6 years, 9 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Harshit Tewari 6 years, 9 months ago

    Since the relative refractive index of glass with respect to water is less than that of glass with respect to air, the bending of light at the interface of glass water is lesser and hence a parallel beam of light falling on the lens is bent less, to meet at point on the principal axis and hence the lens has more focal length in water than in air.

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