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A heavenly body is receding from earth s...

A heavenly body is receding from earth such that the fractional change in `lambda` is 1, then its velocity is

A

c

B

`(3c)/5`

C

`(c)/5`

D

`(2c)/5`

Text Solution

Verified by Experts

The correct Answer is:
A
`(Delta lambda)/(lambda)=(v)/(c)`. It is given that `(Delta lambda)/(lambda)=1`
`:. 1= (v)/(c) or v=c `
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