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Question 20

From Physics HL Paper 1A (May 2025, TZ1)

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  1. Light passes through two parallel layers as shown.
    The refractive indices for light travelling between air and the media are shown in the diagram as n1n_1 and n2n_2.
Diagram illustrating light refraction through two parallel layers, with refractive indices n1=5/3 and n2=4/3, and angles 50 degrees and theta.
Diagram illustrating light refraction through two parallel layers, with refractive indices n1=5/3 and n2=4/3, and angles 50 degrees and theta.

What is θ\theta?

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