Question

A concave mirror of focal length f is placed inside a medium of refractive index then what will he the new focal length of the mirror?​

Answer 1

Answer:

Unless the immersed object a lens, knowing the refractive index of liquid is useless. The angle of reflection will always be same as the incident ray's angle; irrespective of the medium (environment). So the focal length will always be the same.

Answer 2

Answer:

Unless the immersed object a lens, knowing the refractive index of liquid is useless. The angle of reflection will always be same as the incident ray's angle; irrespective of the medium (environment). So the focal length will always be the same.

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