How can the speed of light be the same for everyone, regardless of their state of motion? First, investigate how the speed of light is determined. Next, consider the hypothesized medium for light propagation—the aether—which was dealt a fatal blow by the Michelson-Morley experiment in the 1880s. Finally, examine laboratory proof that the speed of light is constant for all observers. This video is lecture six from the series "The Evidence for Modern Physics: How We Know What We Know" Stream the full series now on Wondrium. http://www.Wondrium.com/YouTube00:00 How Do We Measure the Speed of Light? 06:27 Proving the Speed of Light is Uniform for All Observers 11:11 Maxwell's Equations and Electromagnetism 12:52 The Michelson—Morley Experiment 19:15 Particle Accelerator Offers Further Proof for Speed of Light 23:41 Is the Speed of Light the Same for All Wavelengths? –––––––– Welcome to Wondrium on YouTube. Here, you can enjoy a carefully curated selection of educational videos from our library of history and science series. If you’ve ever wanted to travel back in time, wondered about the science of life, or dreamt of exploring the stars, then Wondrium will be your new favorite channel! If you decide you’d like to learn more about what you love, check out the full experience at http://wondrium.com/YouTube There, you’ll find in-depth answers to everything you’ve ever wondered, with mind-blowing surprises along the way. Your brain is going to love this place! ----------------------------------------- You can also read thousands of articles from the smartest experts in their fields at Wondrium Daily: https://www.WondriumDaily.com And, of course, check us out on all of our social channels: -Facebook: https://www.facebook.com/wondrium -Twitter: http://twitter.com/wondrium -Instagram: https://www.instagram.com/wondrium