1.

A turtle in water (refractive index mu) looks at a stationary cloud vertically above in the air. If h is the height of the cloud and d is the depth of the fortle from the surface, then the distance of the clond as estimated by the turfle is

Answer»

`d+h(1+1/mu)`
`h+d(1-1/mu)`
`d+h(1-1/mu)`
`d+muh`

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