GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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redshifted
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blueshifted.
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Either A or B
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None of the above
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Detailed explanation-1: -Ever since 1929, when Edwin Hubble discovered that the Universe is expanding, we have known that most other galaxies are moving away from us. Light from these galaxies is shifted to longer (and this means redder) wavelengths-in other words, it is ‘red-shifted’.
Detailed explanation-2: -American astronomer Edwin Hubble (who the Hubble Space Telescope is named after) was the first to describe the redshift phenomenon and tie it to an expanding universe. His observations, revealed in 1929, showed that nearly all galaxies he observed are moving away, NASA said (opens in new tab).
Detailed explanation-3: -As a distant galaxy travels away from us, the wavelength of light that it emits stretches and is “redshifted” toward the infrared part of the electromagnetic spectrum. This means that a very distant galaxy emitting primarily visible or ultraviolet light will appear in infrared light by the time its light reaches Earth.