wave_mechanics progressive_waves Question 3
Question: A travelling wave passes a point of observation. At this point, the time interval between successive crests is 0.2 seconds and
[MP PMT 1990]
Options:
A) The wavelength is 5 m
B) The frequency is 5 Hz
C) The velocity of propagation is 5 m/s
D) The wavelength is 0.2 m
Show Answer
Answer:
Correct Answer: B
Solution:
Phase difference between two successive crest is 2p.
Also, phase difference $ (\Delta \varphi ) $ = $ \frac{2\pi }{T} $ time interval $ (\Delta t) $
Therefore $ 2\pi =\frac{2\pi }{T}\times 0.2\Rightarrow \frac{1}{T}=5{{\sec }^{-1}}\Rightarrow n=5Hz $
BETA
