Big-Bang theory explains

Question

Question

This question was previously asked in

WBSSC Group D Official Paper (Held On: 19 Feb, 2017)

Answer 1

The correct answer is origin of Universe.

Key Points

The Big-Bang theory describes the , stating it began as a singularity and expanded rapidly 13.8 billion years ago.
It was first proposed by in 1927 and later supported by Edwin Hubble’s discovery of the Universe’s expansion.
Cosmic Microwave Background (CMB) radiation, discovered in 1964, provides strong evidence for the Big-Bang theory.
The theory explains phenomena such as (hydrogen, helium, and lithium) formed during the Big-Bang nucleosynthesis.
It is widely accepted as the leading scientific explanation for the origin and evolution of the Universe.

Additional Information

Singularity: A point where matter is infinitely dense, marking the beginning of the Universe according to the Big-Bang theory.
Cosmic Microwave Background (CMB): Radiation left over from the early stages of the Universe, discovered by Arno Penzias and Robert Wilson.
Hubble’s Law: States that galaxies are moving away from each other, providing evidence for the Universe’s expansion since the Big Bang.
Big-Bang Nucleosynthesis: Refers to the formation of light elements like hydrogen and helium during the first few minutes after the Big Bang.
Alternative Theories: Other explanations like the Steady State theory have been largely discarded due to lack of evidence compared to the Big-Bang theory.