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Grade 11Wave Motion

Two waves of wave leght m and M sounded together produce 7 beats per second what is the speed of the waves

Profile image of Anirudha Chari
10 Years agoGrade 11
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1 Answer

Profile image of Riddhish Bhalodia
10 Years ago
Assuming their speed is same
The beats are caused by frequency difference
f_1 - f_2 = 7
and
f_1 = v/m \quad \textrm{and} \quad f_2 = v/M

hence by putting it in the equation we get
v = 7mM/(M-m)

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