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With what speed should a glaxy move with...

With what speed should a glaxy move with respect to us so that a certain line at 674 nm is observed at 674.4 nm ?

A

342 `kms^(-1)`

B

471 `kms^(-1)`

C

532 `kms^(-1)`

D

178 `kms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
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