how is the focal length of the spherical mirror affected when it is immersed in water ?
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The focal length of a spherical mirror is not affected when it is immersed in water - it remains same.
Laws of reflection are independent of medium and hence reflection takes place in any medium without the change of focal length.
But, in case of LENS, the focal length changes.
Laws of reflection are independent of medium and hence reflection takes place in any medium without the change of focal length.
But, in case of LENS, the focal length changes.
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