What is the difference between interference and beats?
Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM
Interference pattern is produced when two waves of same frequency travelling in same direction superimpose, while beats are formed when frequencies are slightly different.
In interference, the position of maximum and minimum are permanent i.e., intensity at a given point does not change with time, but in beats the intensity of wave changes at given point with time.
Answered by | 4th Jun, 2014, 03:23: PM
- Define beats. Give the analytical treatment of beats.
- A set of 28 tuning forks is arranged in a series of decreasing frequencies. The first tuning fork is higher ocatve of last tuning fork. When the two consecutive tuning forks are sound together, 4 beats are produced. Find the frequency of first and last tuning fork.
- Two waves of wavelengths 1m and 1.02m produce 13 beats in 2 seconds in air at NTP. Find the velocity of air at NTP.
- (i) A tuning fork T produces n beats/sec with another fork S whose frequency is known to be n1. When T is loaded with wax, the beat frequency decreases. What is the frequency of T? (ii) On loading T if the beat frequency increases, what will be the frequency of T?
- (i) What are beats? Name the basic phenomenon due to which beats are produced. (ii) Two sources of sound are producing waves of frequency n1 and n2, where (n1 - n2) is small. Show mathematically that the beat frequency is (n1 - n2).
- In an experiment it was found that a tuning fork and a sonometer gave 5 beats per second, both when the length of the wire was 1 m and 0.05 m. Calculate the frequency of the fork.
- Two open end organ pipes of length 50 cm and 50.5 cm produce 3 beats/sec. Calculate the velocity of sound in air.
- A note produces 7 beats with tuning fork A of frequency 256 Hz and 3 beats with tuning fork B of frequency 266 Hz. Find the frequency of note.
- A tuning fork gives 3 beats per second with sonometer wire when its length is either 49.8 cm of 50.2 cm. Find the frequency of tuning fork.
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