A Glass Plate Whose Index of Refraction Is 1

question 57

Multiple Choice

A glass plate whose index of refraction is 1.66 is immersed in a liquid.The surface of the glass is inclined at an angle of 44° 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.The index of refraction of the alcohol is closest to:

• A)1.15
• B)1.13
• C)1.11
• D)1.09
• E)1.17

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