Science & Technology2012
Which of the following is/are cited by the scientists as evidence/evidence for the continued expansion of the universe?
- Detection of microwaves in space.
- Observation of redshift phenomenon in space.
- Movement of asteroids in space.
- Occurrence of supernova explosion in space.
Select the correct answer using the codes given below:
Explanation
The correct option is 1 and 2 because the detection of cosmic microwave background radiation (CMB) provides strong evidence for the Big Bang theory, which underpins the idea of an expanding universe. Additionally, the observation of redshift in distant galaxies indicates that they are moving away from us, which corroborates the theory of cosmic expansion. In contrast, movements of asteroids and occurrences of supernovae do not provide substantial evidence for the overall expansion of the universe.