GCSE Physics - What is Red Shift?

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*** WHAT'S COVERED ***
1. Red Shift.
* What red shift is and how it relates to the wavelength of light.
* How red shift provides evidence that distant galaxies are moving away.
2. Absorption Spectra.
* How absorption spectra are created by elements absorbing specific wavelengths of light.
* How the pattern of absorption lines shifts for distant galaxies.
3. The Expanding Universe.
4. The Big Bang Theory.

*** EXAM BOARD INFO ***
AQA - Separate/triple science only
IGCSE Edexcel - Everything is relevant to your course!
Edexcel - Separate/triple science only
OCR 21st Century - Separate/triple science only
OCR Gateway - Separate/triple science only

*** CHAPTERS ***
0:00 Intro to Red Shift & Big Bang
0:15 The Expanding Universe
0:43 Absorption Spectra
1:45 Red Shift Observed in Distant Galaxies
2:03 Explaining Red Shift: Stretching Light Waves
2:30 Expanding Space vs Galaxies Moving Through Space
3:08 Balloon Model of the Expanding Universe
3:53 Distance and Speed of Galaxies
4:07 Limitations of the Balloon Model
4:46 How the Universe Began: The Big Bang Theory

*** PLAYLISTS ***










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