Guide to the Cosmos on Radio Hosted by Dr. Robert Piccioni

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Einstein, Light & the Odd Nobel Prize  We explore how Einstein discovered the true nature of light, and the funny story of his Nobel Prize. Click here for Broadcast Image #1 The photoelectric effect was mysterious because yellow light ejects electrons but red light doesn't. Image #2 Einstein said light is both a wave and a particle (photon)  whose energy is proportional to its frequency.   Image #3 After passing through a small hole, waves expand (diffract).  Particles are simpler. Image #4 Left: Light waves interfere, producing bright and dark stripes (fringes). Right: So do electrons, proving particles have wave properties.