Physics P1 6.5 The Big Bang. 0.0 / 5 ? PhysicsElectromagnetismGCSEAQA Created by: Atlanta and JacobCreated on: 10-09-16 09:40 How did the universe start? The universe started with the Big Bang; a massive explosion from a very small initial point. 1 of 13 What has been happening ever since the Big Bang? The universe has been expanding. 2 of 13 What electromagnetic radiation was created just after the Big Bang? Cosmic microwave background radiation (CMBR). 3 of 13 How can CMBR be explained through? At present CMBR can only be explained by the Big Bang theory. 4 of 13 What is CMBR? Cosmic microwave background radiation. 5 of 13 What dives us evidence that the universe is expanding outwards in all directions? Red-shift. 6 of 13 If the universe is now expanding outwards, what does this suggest? This suggests that the universe started with a massive explosion at a very small initial point, known as the Big Bang theory. 7 of 13 What would have been produced if the universe began with a Big Bang? High energy gamma radiation would have been produced and as the universe expanded this would have become lower-energy radiation. 8 of 13 What have scientists discovered coming from every direction in space? Microwaves - cosmic microwave background radiation (CMBR), the radiation produced by the Big Bang. 9 of 13 How is the existence of CMBR explained? The Big Bang theory is so far the only way to explain it's existence. 10 of 13 What is the Big Bang theory? The theory that the universe began with a massive explosion from a small initial point. 11 of 13 What happens to the wavelength of radiation as it changes from gamma to microwave? The wavelength increases. 12 of 13 **BE SURE THAT YOU CAN EXPLAIN WHY RED-SHIFT IS EVIDENCE FOR AN EXPANDING UNIVERSE AND THE BIG BANG** ** 13 of 13
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