GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It lowers
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It expands
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It disappears
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None of these
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Detailed explanation-1: -Likewise, if a star is zooming away from you, any light it emits gets stretched. You see these stretched-out light waves as having a lower frequency. Since red is at the low-frequency end of the visible spectrum, we say that light from a receding star is shifted toward red, or redshifted.
Detailed explanation-2: -Assistance may be required. As light is moving away from us, the wavelengths become longer, and the waves spread further apart. The light appears red because the wavelength of red on the electromagnetic spectrum is longer.
Detailed explanation-3: -What this means for light coming from distant galaxies moving away from Earth as the universe expands is that the visible lightwaves you would be able to see with your eyes get stretched into longer wavelengths and shift from visible light toward infrared.