GCSE Physics - What is Red Shift?

⭐️ https://www.cognito.org/ ⭐️

** 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 **
   • GCSE Maths (9-1)  

   • GCSE Biology (9-1)  

   • GCSE Chemistry (9-1)  

   • GCSE Physics (9-1)  

   • Alevel Biology  

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