Item 8 Part A You (height of your eyes above the water, h -1.70 m) are standing

Question

Item 8 Part A You (height of your eyes above the water, h -1.70 m) are standing 2.00 m from the edge of a 2.50-m-deep swimming pool (Figure 1). You notice that you can barely see your cell phone which went missing a few minutes before, on the bottom of the pool. The index of refraction of water at this temperature is 1.333. How far from the side of the pool is your cell phone? Express your answer with the appropriate units to three significant figures dValue Units Submit My Answers Give Up Incorrect; Try Again vide Feedback Continue Figure 1 of 1 2.00 m 2.50 m

Explanation / Answer

Bi = arctan(2.00/1.70) = 49.6 degrees

Snell's law:

ni sin(Bi) = nr sin(Br)

(1.00) sin(49.6) = 1.333 sin(Br)

Br = 34.840 degrees

We have:

x = 2.50 tan(34.840) = 1.74 m

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