An concave mirror is held in water.whwt is the change in focal length
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Answer:
the focal length of the concave mirror does not change when it is immersed in water because focal length of the mirror does not depends upon the refractive index of the medium therefore when a convex lens dipped into water it's focal length increase
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Answer:No change
Explanation: If a concave mirror is kept in water, the path of light ray won't be affected. It'll follow the laws of reflection and reflect according to the angle of incidence. However when it comes out of water, there might be change in its pathway due to refraction.
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