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The equation of a wave travelling in a s...

The equation of a wave travelling in a string can be written as ` y=3cos pi ( 100 t- x) .` Its wavelength is

A

3 cm

B

10 cm

C

2 cm

D

5 cm

Text Solution

Verified by Experts

The correct Answer is:
B
`y=3cospi(100t-x)=3cos(100pit-pix)`
Comparing it with `y=acos((2pi)/(T)t-(2pi)/(lambda)x)`, we get `(2pi)/(lambda)=piorlambda=2cm`
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