If the wavelength of light coming from a galaxy shifts towards the red end of space then galaxy is:
Correct answer: B. Receding the Earth
- A. Approaching Earth
- B. Receding the Earth
- C. Stationary
- D. Approaching Earth or is stationary
Explanation
If the wavelength of light coming from a galaxy shifts towards the red end of the spectrum, it indicates that the galaxy is receding from the earth. This phenomenon is known as red shift. When an object (such as galaxy) moves away from an observer, the light waves emitted by the object get stretched, causing the wavelength of the light to become longer. As a result, the light appears more redshifted. Therefore, the red shift of the light from the galaxy indicates that it is moving away from the Earth, suggesting that the galaxy is receding.
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