Assertion Superposition of two harmonic waves, one of frequency \( 11 \mathrm{~Hz} \) and the ot...

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Assertion Superposition of two harmonic waves, one of frequency \( 11 \mathrm{~Hz} \) and the other of frequency \( 9 \mathrm{~Hz} \) give rise to beats of frequency \( 2 \mathrm{~Hz} \).
Reason Harmonic waves of nearly equal frequencies interfere to give rise to beat having beat frequency, \( v_{\text {beat }}=\left|v_{1}-v_{2}\right| \)
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