Why Is the Sky Blue? (And Why You've Been Told the Wrong Answer)

Why is the sky blue? And why have you probably been told the wrong answer? You've wondered this since you were a kid. Maybe your parents told you it's because of dust or pollution in the air. But that's actually wrong. In this video, I break down: What sunlight really is (it's not white – it's all colors) What happens when sunlight hits Earth's atmosphere Rayleigh scattering – why blue light bounces around the most Why blue light scatters nine times more than red light Why sunsets are red (and sunrises are pink) Why the sky isn't violet (even though violet scatters even more) Why the sky looks bluer on some days than others Why the sky on Mars is yellow-brown (and why our blue sky is unique to Earth) No boring lectures. Just the beautiful physics of why you see a blue sky. If you've ever wondered why the sky is blue – or if you've been telling people the wrong answer – this one's for you. Subscribe for more weird explanations for everyday mysteries: [link] WhyIsThatTrue – I read the papers so you don't have to. 🔍 TIMESTAMPS 0:00 – The hook (when did you last ask why the sky is blue?) 1:30 – The wrong answer (dust/pollution – actually false) 3:00 – What is sunlight? (white light = all colors) 5:00 – Earth's atmosphere (molecules in the air) 7:00 – Rayleigh scattering (light bouncing everywhere) 9:00 – Blue scatters 9x more than red 11:00 – Why sunsets are red (long path through atmosphere) 13:00 – Why the sky isn't violet (your eyes aren't sensitive to it) 15:00 – Why some days are bluer than others (clear air vs. pollution) 17:00 – The sky on Mars isn't blue (it's yellow-brown) 19:00 – You're seeing physics, not just color #SkyBlue #Science #Physics #WhyIsThatTrue #RayleighScattering #Sunset #Mars #Atmosphere #CuriousMinds