GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The blue-shift of light emitted by stars
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The yellow color of most stars
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The lack of life on other planets
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The red-shift of light emitted by stars
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Detailed explanation-1: -The Doppler red-shift of light observed from distant stars and galaxies gives evidence that the universe is expanding (moving away from a central point). This allows for Big Bang Theory, because after a “bang” occurs all of the matter moves away from the point of origin.
Detailed explanation-2: -What is Redshift Theory? Redshift is a phenomenon that occurs with waves of electromagnetic radiation when they demonstrate the Doppler effect by their source moving away from an observer. When the source of the light is moving away from the observer, the frequency of the light observed is shifted toward the color red.
Detailed explanation-3: -When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift. Astronomers use redshift and blueshift to deduce how far an object is away from Earth, the concept is key to charting the universe’s expansion.
Detailed explanation-4: -Some pieces of evidence used to prove the big bang theory are moving galaxies, cosmic background, and the age of the universe.