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Robert R. Wilson: 1914–2000

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Angles, units and approximations

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Analysing the complexities of waves

Questions on electromagnetic waves can be based on a range of topics from the specification. Your task, which is not an easy one, is to maximise your marks by demonstrating clear knowledge and understanding of these topics

This question is about a laser pen.

(a) Define the terms phase difference and coherence. (2 marks)

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Previous

Robert R. Wilson: 1914–2000

Next

Angles, units and approximations

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