Question

A pond of refractive index 1.33 is 4m depth. If you see normally the bottom of the pond what is the depth of pond to your eyes?

A) 3m
B) 1m
C) 4m
D) 2m​

Answer 1

Answer:

THE ANS IS APPROXIMATELY IS 3

Answer 2

Answer :

Real depth of pond = 4m

Refractive index of water = 1.33 = 4/3

We have to find apparent depth of pond$.$

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◈ Relation between absolute refractive index of medium, real depth and apparent depth is given by

• η = real depth / apparent depth

➝ η = d/d'

➝ 4/3 = 4/d'

➝ d' = 3m

Additional Information :

• Refractive index of medium is defined as the ratio of speed of light in vacuum to the speed of light in medium.
• Refractive index of medium 1 wrt 2 is given by, n₁₂ = n₁ / n₂