GCSE Physics - What is Red Shift? #87

This video answers: - What is red shift? - How did we discover red shift? - Why is space stretching - Why is the universe expanding - How to we know the universe is expanding Exam board specific 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 Maths Playlist: GCSE Chemistry playlist: GCSE Biology Playlist: GCSE Physics Playlist: