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⭐️ Check out our website 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 *** https://youtube.com/playlist?list=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh&si=orIUwL3o2jOoiYjT https://youtube.com/playlist?list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g&si=DcihOwUkd9oWbbdp https://youtube.com/playlist?list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W&si=Y8MsO-FK948jnxpS https://youtube.com/playlist?list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7&si=-7i5Iq7yOeJrhtu6 https://youtube.com/playlist?list=PLidqqIGKox7VKJD2WxRhoKaI6JGLVean8&si=NH_Q1ujhVgACM2FU #GCSE #Physics #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE #IB #AP
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