Three Materials with N₁ < N₂ < N₃ Are Arranged $\degree$

question 71

Multiple Choice

Three materials with n₁ < n₂ < n₃ are arranged in layers of uniform thickness.A light ray in air enters the first layer at an angle of incidence of 30 $\degree$ and the ray eventually exits the third layer at the refracted angle q in air.What is the value of q?

• A)Some angle less than 30 \(\degree\).
• B)30 \(\degree\).
• C)Some angle more than 30 \(\degree\).
• D)Insufficient information to answer.

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