GCSE Physics - What is Red Shift? #87

The video explains the concept of the universe expanding, evidenced by the redshift of light from distant galaxies. It introduces absorption spectra to understand redshift and uses a balloon model to illustrate how space itself expands, causing galaxies to appear as if they are moving away. The video concludes with a discussion on the Big Bang theory, proposing that the universe began from a tiny, dense, and hot state, expanding rapidly to its current form.

What new insight or understanding did you gain from this video?