A Glass Plate Whose Index of Refraction Is 1

question 16

Multiple Choice

A glass plate whose index of refraction is 1.56 is immersed in a liquid.The surface of the glass is inclined at an angle of 42.0° with the vertical.A horizontal ray in the glass is incident on the interface.When the liquid is a certain alcohol,the incident ray arrives at the interface at the critical angle.What is the index of refraction of the alcohol?

• A) 1.04
• B) 1.02
• C) 1.00
• D) 0.984
• E) 1.06

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