Hello cramsters, I need help with this calc-based physics problem. It\'s fromSer

Question

Hello cramsters, I need help with this calc-based physics problem. It's fromSerway/Jewett, Physics for Scientists and Engineers, Chapter 35,Problem 18. The question asks
An opaque cylindrical tank with an open top has a diameter of3.00 m and is completely filled with water. When the afternoon sunreaches an angle of 28.0 degrees above the horizon, sunlight ceasesto illuminate any part of the bottom of the tank. How deep is thetank?
Thanks in advance.
I need help with this calc-based physics problem. It's fromSerway/Jewett, Physics for Scientists and Engineers, Chapter 35,Problem 18. The question asks
An opaque cylindrical tank with an open top has a diameter of3.00 m and is completely filled with water. When the afternoon sunreaches an angle of 28.0 degrees above the horizon, sunlight ceasesto illuminate any part of the bottom of the tank. How deep is thetank?
Thanks in advance.

Explanation / Answer

The angle of incidence i = 620 Angle of refraction r is given                                              sin i / sin r = nW            sin 62 / 1.33 = sin r           r =41.48 Deapth of tank   h is givenas                                              h = d / tan r                      =3m / tan ( 41.48 )                      = 3.39 m

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