Warum geht WLAN durch Wände aber Licht NICHT? Feynman erklärt

Why does Wi-Fi travel through walls but light doesn't? The astonishing answer lies in wavelength and photon energy—and Richard Feynman gave us the tools to truly understand it. Wi-Fi and light are both electromagnetic waves. Both travel at 299,792 km/s. But a Wi-Fi wave is 240,000 times longer than light—and its photon has 100,000 times less energy. That's the whole trick. Wi-Fi wavelength is 240,000 times longer than light—and its photon has 100,000 times less energy. In this video, you'll learn: Why Wi-Fi, light, and X-rays are physically the SAME — just with different wavelengths How wavelength determines whether a wave penetrates or is blocked Why your phone cuts out in the elevator (Faraday cage) Why trees absorb your Wi-Fi — and concrete is more transparent than a wet tree trunk What Feynman diagrams really mean and how quantum electrodynamics explains your living room Why glass is transparent to light — but blocks UV radiation Why your shadow has sharp edges — and a Wi-Fi shadow would be blurry CHAPTERS: 00:00 The Riddle — Wi-Fi through walls, but light doesn't? 00:30 3 Tools, 1 Answer 01:00 What are radio waves and light, anyway? 02:00 Wavelength — The Whole Trick 02:30 Speed ​​of Light as a Constant 02:30 Why Walls Stop Some Waves 04:00 The Atomic Structure of a Wall — A Network, Not a Wall 04:30 Photon Energy and Feynman's Secret 06:00 Quantum Probability — Not Certainty 06:30 Diffraction — Waves Around Corners 07:30 Why Your Shadow Is Sharp 08:30 Why Glass Is Transparent 09:00 Why Your Cell Phone Cuts Out in Elevators 09:30 Trees Absorb Wi-Fi 10:00 X-rays Through Flesh, Not Bones 10:30 The Mystery of Dead Zones 11:00 Radio Waves — Longer Wavelength, Greater Range 11:30 Maxwell's Equations — The Foundation 12:00 Wave-Particle Duality 12:30 Permittivity — Matter's Response 13:00 Plasma Even Blocks Light 13:30 The Secret of the Antenna 2:00 PM The Answer in One Sentence: Size + Energy 2:30 PM Feynman's Wire Mesh Trick 3:00 PM 3 Rules, Infinitely Many Answers 3:30 PM Router Placement = Physics in the Living Room 4:00 PM Physics = New Vision 4:30 PM 7-Day Challenge 5:00 PM More Feynman 5:30 PM Stay Curious RELATED VIDEOS: Why Electrons NEVER Fall into the Nucleus — Feynman Explains:    • Warum Elektronen NIEMALS in den Kern falle...   Time Can Be Negative — Feynman Explains the Impossible Experiment:    • Zeit kann NEGATIV sein – Feynman erklärt d...   Light Doesn't Move! — Feynman Explains:    • Feynman erklärt: Licht bewegt sich NICHT! ...   Conservation of Energy: What Feynman NEVER Told You in School:    • Energieerhaltung: Was Feynman dir NIEMALS ...   STUDIES & SOURCES: Electromagnetic Spectrum — Overview: https://en.wikipedia.org/wiki/Electro... Quantum Electrodynamics (QED) — Feynman Theory: https://en.wikipedia.org/wiki/Quantum... Faraday Cage — Electromagnetic Shielding: https://en.wikipedia.org/wiki/Faraday... Wave Diffraction and Obstacle Size: https://en.wikipedia.org/wiki/Diffrac... NIST — EM Signal Attenuation in Building Materials (2.4 GHz): https://www.nist.gov/publications/ele... Wi-Fi attenuation by building materials — experimental measurement (2.4 & 5 GHz): https://www.scirp.org/journal/paperin... EM wave attenuation by wood, concrete, and metal (MDPI 2024): https://www.mdpi.com/2076-3417/15/24/... Photon energy and electron transitions — absorption: https://physics.stackexchange.com/que... Fermilab — Why radio waves pass through walls: https://www.fnal.gov/pub/science/inqu... Photon energy and electron transitions — absorption: https://physics.stackexchange.com/que... Fermilab — Why radio waves pass through walls: https://www.fnal.gov/pub/science/inqu... ] 7-DAY CHALLENGE: For 7 days, observe radiation phenomena in your everyday life—and explain them using the 3 rules from this video! Write your answers in the comments: Day 1: Why does the sun warm you through the window but not tan you? Day 2: Why does the microwave heat water but not the plastic container? Day 3: Why does your car key sometimes not work near a cell tower? Day 4: Why is Wi-Fi often better in the bathroom than in the living room? Day 5: Why does a metal cabinet block the signal, but a wooden wall hardly does? Day 6: Why can you see through glass but not through aluminum? Day 7: Why does radio signal weaken behind a hill, but light doesn't at all? I'll read EVERY comment—share your Feynman moment! ...`` ``` ``` ```` ````````````````````````````````````````````````````` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` `` SUBSCRIBE — new explanations every Monday & Thursday: https://www.youtube.com/@Feynmanerklä....