A distant galaxy emits light that has a wavelength of 638.3 nm. On earth, the wavelength of this light is measured to be 639.7 nm. (a)Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give youranswer to 4 significant digits. Use 2.998 × 108 m/s as the speed of light.)(a) The galaxy is(b) Number ifrom the earth.UnitsSUPPORT

Answered: A distant galaxy emits light that has a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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A distant galaxy emits light that has a wavelength of 638.3 nm. On earth, the wavelength of this light is measured to be 639.7 nm. (a)
Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give your
answer to 4 significant digits. Use 2.998 × 108 m/s as the speed of light.)
(a) The galaxy is
(b) Number i
from the earth.
Units
SUPPORT

Expert Solution

Step 1: Redshift and Blueshift

When an object is moving away from an observer, the observed wavelength of light from that object is longer, resulting in a redshift. Conversely, when an object is moving towards an observer, the observed wavelength of light is shorter, resulting in a blueshift.

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