What astronomers call "the red shift" is due to the _________________ – McqOptions

MCQOPTIONS

1.	What astronomers call "the red shift" is due to the _________________ because of Doppler effect.
A.	decrease in wavelength
B.	increase in wavelength
C.	source is moving closer to the observer
D.	observer is moving closer to the source
Answer» C. source is moving closer to the observer

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