# Physics

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A submerged scuba diver looks up towards the calm water of a lake and notes that the Sun appears to be 20 from the vertical. The diver's friend, standing on the shore of the lake, is also looking at the Sun.

At what angle from the vertical does the diver's friend see the Sun ? Assume the refractive index of water is 1.33.

• Physics -

If the scuba diver is looking from the water n=1.33 and the other man is above water so n=1, use the equation n1sin(theta)=n2sin(theta).
1.33sin(20)=1sin(theta)
27.06 degrees is the answer, but since it says from the horizontal do 90-27.06

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