Answer to Question #164205 in Optics for enam

Question

(a.) Beats are heard when a tuning fork and a sonometer wire vibrate simultaneously with

frequencies f1 and f2 respectively, f2 being slightly different from f1.

(i.) Explain what is meant by the term beats and explain how they are formed.

(ii.) Show that the beat frequency is equal to the difference between fi and f2·

Answer 1

Answer

i) according to physics concept

Beats are generated when two sounds have similar frequency or almost equal to each other. The effect is that the sound's amplitude or volume oscillates or beats. The beat phenomenon is caused by constructive and destructive interference. The picture below shows the beat generated by two tuning forks with very close frequencies.so beats are formed.

ii)we know that The formula for beat frequency is the difference in frequency of the two superimposed waves.

f_b =|f2−f1|

f₁ and f₂ are the frequency of two waves. So we can say the beat frequency is equal to the difference between fi and f2·