p38 063

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63.

(a) Eq. 38-33 yields

v =

λ

λ

c =



462

434

434



c = 0.065c

or v = 1.93

× 10

7

m/s.

(b) Since it is shifted “towards the red” (towards longer wavelengths) then the galaxy is moving away

from us (receding).


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