NEET UG PHYSICS MCQ: WAVES

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Application +4 | -1

The equation of a plane progressive wave is

\mathrm{y}=0.09 \sin 8 \pi\left(\mathrm{t}-\frac{\mathrm{x}}{20}\right)

When it is reflected at rigid supports, its amplitude becomes (2/3)rd of its previous value. The equation of the reflected wave is :

View answer and explanation

Correct option: D

y=-0.06 \sin 8 \pi\left(t+\frac{x}{20}\right)

Option D is correct because the reflected wave has an amplitude of 0.06, is inverted due to reflection at a rigid support, and travels in the opposite direction.

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