The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is:

Question

The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is: (A)  49° to the horizontal (B)  90° with the vertical (C)  49° to the vertical (D) along the horizontal

Tardigrade Admin · Accepted Answer

sin θ =(1/μ w)=(1/1.33)⇒ θ = sin -1( (1/1.33) ) =49° to the vertical

Q. The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is:

$49^{\circ}$ to the horizontal

$90^{\circ}$ with the vertical

$49^{\circ}$ to the vertical

along the horizontal

in any direction

$sin θ = \frac{1}{μ _{w}} = \frac{1}{1.33} \Rightarrow θ = sin^{- 1} (\frac{1}{1.33})$ $= 49^{\circ}$ to the vertical

Q. The refractive index of water is 1.33. The direction in which a man under water should look to see the setting sun is:

49∘ to the horizontal

90∘ with the vertical

49∘ to the vertical