Sound WavesHard
Question
At a point, beat frequency of n Hz is observed. It means that :
Options
A.medium particles at that point are vibrating with a frequency of n Hz.
B.amplitude of vibrations changes simple harmonically with frequency n Hz at the point only
C.at that point, zero intensity is observed 2n times per second
D.amplitude of vibration changes simple harmonically with 
Hz at the point
Hz at the pointSolution
When two waves of different frequency superimposes beats is being formed.
Eq. of Two superimposed wave
Y = 2A cos(ω1 − ω2/2). Sin(ω1 + ω2/2)
2A cos(ω1 − ω2/2) is amplitude at that point. So frequency vibration is n/2
Eq. of Two superimposed wave
Y = 2A cos(ω1 − ω2/2). Sin(ω1 + ω2/2)
2A cos(ω1 − ω2/2) is amplitude at that point. So frequency vibration is n/2
Create a free account to view solution
View Solution FreeMore Sound Waves Questions
The transverse displacement y (x,t) of a wave on a string is given by y(x, t) = e-(ax2+bt2 +2√ab xt). This represe...One end of a taut string of length 3 m along the x-axis is fixed at x = 0. The speed of the waves in the string is 100 m...A boat at anchor is rocked by wave whose crests are 100m apart and velocity is 25 m/sec. The boat bounces up once in eve...If A is the area of cross-section of a spring L is its length E is the Young′s modulus of the material of the spri...A transverse wave is described by the equation y = y0sin2π (ƒt -). The maximum particle velocity is equal to f...