A Container of Flint Glass (N = 1

question 20

Multiple Choice

A container of flint glass (n = 1.66) holds a small quantity of benzene (n = 1.501) . What is the critical angle for internal reflection of a ray in the liquid when it is incident on the liquid-to-glass surface?

• A) 89.5°
• B) 64.7°
• C) 41.1°
• D) The critical angle does not occur in this case.

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