Which of the following is /are cited by the scientists as evidence/evidences for the continued expansion of the universe?
- Detection of microwaves in space
- Observation of the redshift phenomenon in space
- Movement of asteroids in space
- The occurrence of supernova explosions in space
Detailed Explanation:
✅ Statement 1 – Correct: Cosmic Microwave Background (CMB) radiation is relic radiation from the Big Bang, discovered by Penzias and Wilson, providing strong evidence for the expanding universe model.
✅ Statement 2 – Correct: Redshift phenomenon shows that light from distant galaxies is stretched as they move away, demonstrating universal expansion as per Hubble's Law.
❌ Statement 3 – Incorrect: Asteroid movement is governed by local gravitational forces within solar systems and has no relevance to large-scale cosmic expansion.
✅ Statement 4 – Correct: Type Ia supernovae serve as standard candles for measuring cosmic distances, providing evidence for the universe's accelerated expansion and leading to the discovery of dark energy.
Question 8 of 8 Basics of Space Science
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