Diver Scuba
A submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the Sun appears t
A submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the Sun appears to be 21° from the vertical. The diver's friend's standing on the shore of the lake. At what angle above the horizon does the friend see the sun?
Unfortunately, kmatlhare has it exactly backwards: He's intermingled the indices of refraction, and thus got 15.6 degrees.
Thus, the correct answer:
n_1*sin(angle_1 ) = n_2*sin(angle_2)
1.333 * sin(21 deg) = 1 * sin(angle_2)
sin(angle_2) = 1.333 *0.3584
= 28.536 deg
which is a greater deflection than 21 degrees - as must be the case.
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