A distant galaxy emits light that has a wavelength of 5505

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Reference no: EM13623065

A distant galaxy emits light that has a wavelength of 550.5 nm. On earth, the wavelength of this light is measured to be 450.8 nm.

(a) Decide whether this galaxy is approaching or receding from the earth. Give your reasoning.

(b) Find the speed of the galaxy relative to the earth.

Reference no: EM13623065

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