Refraction

1 mark · Normal

What is always true when a wave is reflected from a flat barrier?

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Correct option: The angle of incidence equals the angle of reflection.

Common mistakes: Choosing refraction or speed change

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Marking points

B1 · 1 mark · Correctly identifies the law of reflection as the always true statement

Worked solution

The correct answer is: The angle of incidence equals the angle of reflection.