Question
Question: How does the red shift confirms that the universe is expanding...
How does the red shift confirms that the universe is expanding
A
Due to Wien's law
B
Due to Stefan's law
C
Due to Kirchhoff's law
D
Due to Doppler's effect
Answer
Due to Doppler's effect
Explanation
Solution
If the light received from galaxies indicates a shift towards the red end of spectrum of light, it means that the galaxies should be receding away (Doppler's effect). Therefore we conclude that the universe is expanding.