Short answerEasy1 mark
4(i)
A ray of light enters a glass block from air and comes out from the opposite surface. If the angle of refraction at the first surface is not the same as the angle of incidence at the second surface, then:
What is the product of the ratio sin i / sin r at the first surface and at the second surface?
Topic: Snell's law at two surfaces
Question wording verified against source paper
Answer
Exam answer
1.
Explanation
At the first surface sin i₁/sin r₁ = μ, while at the second surface sin i₂/sin r₂ = 1/μ. Their product is 1.
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