A harmonic wave of wavelength travels along a string towards a rigid wall and is…

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A harmonic wave of wavelength 0.80 m0.80\,\text{m} travels along a string towards a rigid wall and is reflected back. How far from the wall is the first point on the string that always attains maximum displacement? (a) 0.40 m0.40\,\text{m} (b) 0.10 m0.10\,\text{m} (c) 0.20 m0.20\,\text{m} (d) 0.80 m0.80\,\text{m}

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