PHYSICS - Astrophysics - Red Shift

The video explores the concept of the expanding universe, focusing on Edwin Hubble's contributions. It explains how Hubble used the Doppler effect to observe redshift in galaxies, providing evidence for an expanding universe. The video also discusses the Doppler effect, using sound and light examples, and concludes with the implications of redshift for the Big Bang Theory.

What evidence did Edwin Hubble use to support the idea of an expanding universe?

Explain how Hubble's observations changed the scientific understanding of the universe's size.

How does the Doppler effect relate to the light observed from distant galaxies?

What does redshift indicate about the movement of galaxies?

What conclusion did Hubble reach regarding the relationship between distance and the speed of galaxies?