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What happens to the focal length …

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What happens to the focal length of a lens which is immersed in water?

    • Posted by Satyawan Singh 6 years, 10 months ago

    CBSE > Class 12 > Physics
    • 3 answers

    Deepak Jindal 6 years, 10 months ago

    No change

    0Thank You

    Yogita Ingle 6 years, 10 months ago

    In case of spherical mirrors (both concave and convex), there will be no change in the focal length of the mirrors when immersed in water. This is because the focal length of mirrors does not depend on the external medium in which it is held.
    In case of lenses, refraction takes place. When a lens is immersed in water, the value of refractive index decreases. Hence its focal length increases.

    0Thank You

    Naman Gupta 6 years, 10 months ago

    no change

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