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The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point in the medium in 2 min, then their wavelength is
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- 13.8 m
- 25.3 m
- 41.5 m
- 57.2 m
Correct Option: B
Speed of the wave (v) = 760 m/s; Number of waves = 3600 and time taken (t) = 2 min = 120 sec. Frequecny of waves
| = | = 30/sec | |
| 120 |
∴ wavelength of waves (λ)
| (n) = | = | = 25.3 m. | ||
| n | 30 |
[Alt : λ = ct/w , where c = velocity of wave
t = time in second
w = no. of waves]
