Answers

2015-06-26T21:43:44+05:30
For any liquid ,
                          real depth/apparent depth = μ
                  apparent depth = real depth(l) - shifting(dl)
           so shifting = l(1-(1/μ))
   now for water layer l = 4cm and μ = 4/3
so shifting caused by  water = 4(1-(3/4)) cm = 1 cm
   for organic liquid, l = 6cm and μ = 1.48
so shifting caused by organic liquid = 6(1-(100/148)) = 1.95 cm = 2 cm (approx)
 so total shifting = 1+ 2 = 3 cm
now apparent depth = (4+6) - 3 =7 cm
so the bottom of tank appear to be   7cm below the water surface                                                                

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