Respuesta :
D. the doppler effect,
like when a police siren drives past and sounds faster, and then slower as it drives off
like when a police siren drives past and sounds faster, and then slower as it drives off
Answer:
B. Doppler effect
Explanation:
- The cosmic redshift is caused by the expansion of space as a result of the big bang which resulted in the expansion of space and created multiple galaxies that are far moving away from each other.
