KVPY SX SB Exam 2012 Question Paper

Question : 96 of 120

Marks: +1, -0

On a bright sunny day a diver of height h stands at the bottom of a lake of depth H. Looking upward, he can see objects outside the lake in a circular region of radius R. Beyond this circle he sees the images of objects lying on the floor of the lake. If refractive index, of water is

4/3

, then the value of R is

${3(H-h)}/√7$
$3h√7$
$(H-h)/√{7\/3}$
$(H-h)/√{5\/3}$

Validate

Solution:

\R=h'/√{\µ_^2-1}

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