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Red Shift UPSC NOTE

 

  • Redshift is a phenomenon in which the wavelength of light is stretched, or shifted towards the red end of the spectrum. 

  • This can be caused by a number of factors, including the Doppler effect and the expansion of the universe.

  • The Doppler effect is a change in the frequency of a wave in relation to an observer who is moving relative to the wave source. 

  • When a source of sound is moving away from an observer, the sound waves are stretched out, resulting in a lower pitch. 

  • This is known as the Doppler shift. 

  • The same principle applies to light waves. 

  • When a source of light is moving away from an observer, the light waves are stretched out, resulting in a redshift.

  • The expansion of the universe is another cause of redshift. As the universe expands, the space between galaxies is stretched. 

  • This stretching also stretches the light waves traveling between galaxies, resulting in a redshift.


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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Red Shift UPSC NOTE
Red Shift UPSC NOTE
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