Question

when bottom of water body is viewed from air at nearly normal incidence show that apparent depth= real depth/refractive index of water​

Answer 1

Explanation:

μw   is refractive index of water so now from snells law

μwsini=sinr

μw=sinisinr and for small angle; sinθ=θ=tanθ

hence, μw=tanitanr

tanr=aA,tani=dA

hence μw=ad=apparent depth real depth 

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