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There are different fish, monkeys and water of the habitable planet of the star Proxima b. A fish swimming underwater

Monjur Alahi

There are different fish, monkeys and water of the habitable planet of the star Proxima b. A fish swimming underwater feels that there is a monkey at 2.5 m on the top of a tree. The same monkey feels that the fish is 1.6 m below the water surface. Interestingly, height of the tree and the depth at which the fish is swimming are exactly same. Refractive index of that water must be 

(A) 6/5 

(B) 5/4 

(C) 4/3 

(D) 7/5


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Salim Ahmed Kawsar

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Correct answer is (B) 5/4

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