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Question

For a diver inside a pool of clean water, line of sight of setting Sun makes θ with vertical as shown, then (sin 49o=34)

  1. θ=45o
  2. deviation produced due to refraction is 49o
  3. θ=49o
  4. deviation produced due to refraction is 131o


Solution

The correct option is C θ=49o
Grazing incidence ray from rarer to denser enters at critical angle. Hence,
sin θC=nrarerndenser=143=34
(θC=49o)

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