The Doppler Effect and the Big Bang Theory

The video tutorial explains the Doppler Effect, which is the change in wavelength of a wave when the source moves relative to the observer. It discusses how the Doppler Effect is observed in everyday life with sound, such as the change in pitch of an ambulance siren as it moves past an observer. The tutorial also covers the Doppler Effect with light, known as redshift, where light from moving sources shifts towards the red end of the spectrum. This redshift observation in distant galaxies supports the Big Bang Theory, suggesting that the universe is expanding. Since 1998, observations indicate that distant galaxies are receding faster than previously thought.

What evidence do observations of distant galaxies provide regarding the expansion of the universe?

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Describe the implications of the Big Bang Theory based on the observations of supernovae.

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