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A-LevelPhysicsWaves9702/12 · Oct/Nov 2009 · Q231 Mark

The light from two lasers passes through a vacuum. One laser emits red light and the other emits green light. Which property of the two laser beams must be different?

Aamplitude

Bfrequency

Cplane of polarisation

Dspeed

✓ Correct answer

B: frequency

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About this question

Topic: Waves, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2009 Paper 1 Variant 2, question 23.

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