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The equation of a progressive wave is gi...

The equation of a progressive wave is given by
`y=a sin (628 t-31.4 x)`
If the distances are expressed in cms and time in seconds, then the wave velocity will be

A

314 cm/sec

B

628 cm/sec

C

20 cm/sec

D

400 cm/sec

Text Solution

Verified by Experts

The correct Answer is:
C
We use
`v = (co - "efficient of t")/(co - "efficient of x") = (628)/(31.4) = 20 cm//s`
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