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Solution


Q.

A concave mirror of focal length f in air is dipped in a liquid of refractive index μ. Its focal length in the liquid will be          [2025]
1 fμ  
2 f(μ–1)  
3 μf  
4 f  

Ans.

(4)

Focal length of mirror will not change because focal length of mirror dosen't depend on medium.