GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It was used by Hubble to measure velocities of galaxies.
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It indicates galaxy motion through changes in sound waves.
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It indicates a galaxy moving toward Earth through red shift.
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It indicates a galaxy moving away from Earth through blue shift
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Detailed explanation-1: -Expert-Verified Answer. (Statement a) it was used by Hubble to measure velocities of galaxies accurately describes Doppler effect. Doppler effect helps in learning about the universe and its galaxies. It indicates galaxy motion via light wavelength and not sound waves.
Detailed explanation-2: -What statement accurately describes the Doppler effect? It was used by Hubble to measure velocities of galaxies.
Detailed explanation-3: -The Doppler effect doesn’t just apply to sound. It works with all types of waves, which includes light. Edwin Hubble used the Doppler effect to determine that the universe is expanding. Hubble found that the light from distant galaxies was shifted toward lower frequencies, to the red end of the spectrum.