Lesson: Chapter 5 — Optics

5.3. Refraction of light 3 of 5 Reset answers

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Question 3

What causes refraction?

A Light loses energy B Light changes colour C The speed of light changes from medium to medium D Mirrors inside the glass

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The speed of light changes from medium to medium. In a vacuum it is 3 × 10⁸ m s^-1; in any other medium it is less.

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