Question

An observer on earth observes that wavelength
of spectral line in spectrum of a milky way shifts
towards red end of spectrum. According to the
observer, the milky-way is
(a) approaching the earth
(b) receding away from earth
(c) stationary
(d) rotating about its own axis

Answer 1

$\huge\star\underline\mathcal\purple{HELLO}$

An observer on earth observes that wavelength

of spectral line in spectrum of a milky way shifts

towards red end of spectrum. According to the

observer, the milky-way is

(a) approaching the earth

(b) receding away from earth

(c) stationary

(d) rotating about its own axis ✔✔

Answer 2

Answer:

it is receding away from the earth