Light is in a crystal with an index of refraction of 1.75. The crystal is in air. The light traveling in the crystal is incident on the crystal-air interface. What is the angle of incidence that, using Snell's law, would lead to an angle of refraction of 90 degrees? Give your answer in degrees.

Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter34: The Nature Of Light And The Principles Of Ray Optics
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Light is in a crystal with an index of refraction of 1.75. The crystal is in air. The light traveling in the crystal is incident on the crystal-air interface. What is the angle of incidence that, using Snell's law, would lead to an angle of refraction of 90 degrees?

Give your answer in degrees.

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