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The Expanding Universe Video Lecture | Physics for GCSE/IGCSE - Class 10

FAQs on The Expanding Universe Video Lecture - Physics for GCSE/IGCSE - Class 10

1. What is the expanding universe theory?

Ans. The expanding universe theory suggests that the universe is constantly expanding, with galaxies moving away from each other as time progresses. This theory is based on observations such as the redshift of light from distant galaxies.

2. How was the expanding universe theory discovered?

Ans. The expanding universe theory was first proposed by Belgian astronomer Georges Lemaître in the 1920s. The theory was later supported by observational evidence, such as the discovery of the redshift of galaxies by Edwin Hubble.

3. What is the significance of the expanding universe theory?

Ans. The expanding universe theory has significant implications for our understanding of the origin and evolution of the cosmos. It suggests that the universe began from a hot, dense state known as the Big Bang and has been expanding ever since.

4. How does the expanding universe theory relate to dark matter and dark energy?

Ans. The expanding universe theory predicts the existence of dark matter and dark energy, mysterious forms of matter and energy that make up a large portion of the universe. These substances are thought to play a crucial role in the acceleration of the universe's expansion.

5. Will the universe continue to expand indefinitely?

Ans. The ultimate fate of the universe is still a topic of debate among scientists. While current observations suggest that the universe is expanding at an accelerating rate, it is unclear whether this expansion will continue indefinitely or eventually slow down or reverse.

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Oct 02, 2025 Last updated

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	Physics for GCSE/IGCSE 126 videos\|182 docs\|35 tests

Physics for GCSE/IGCSE

126 videos|182 docs|35 tests

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