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Short lecture on the photoelectric effect. When ultraviolet light hits a metal surface, electrons are ejected. Classical mechanics incorrectly predicts that the kinetic energy of the eljected electrons is proportional to the intensity and independent of frequency. Einstein used a quantum hypothesis to correctly predict that the kinetic energy is independent of intensity and proportional to frequency above a threshold frequency. The work function is equal to the ionization energy of the metal electrons, with the remainder of the photon energy giving kinetic energy to the electron. The same value of Planck's constant from blackbody radiation makes these equations match with experiment. Notes Slide: http://imgur.com/fFq9dO9.png --- About TMP Chem --- All TMP Chem content is free for everyone, everywhere, and created independently by Trent Parker. Email: [email protected] --- Video Links --- Chapter Playlist: https://www.youtube.com/playlist?list=PLm8ZSArAXicLxU2lg3NvnHvOYsZSr4r3d Course Playlist: https://www.youtube.com/playlist?list=PLm8ZSArAXicL3jKr_0nHHs5TwfhdkMFhh Course Review: https://www.youtube.com/playlist?list=PLm8ZSArAXicLTRn3cJyyU1TiU7n_Pp4X1 Other Courses: https://www.youtube.com/playlist?list=PLm8ZSArAXicIXArfap9Tcb8izqRPvE0BK Channel Info: https://www.youtube.com/playlist?list=PLm8ZSArAXicLlGO4Rvpz-D6vX8MFbOn4V --- Social Links --- Facebook: https://www.facebook.com/tmpchem Twitter: https://www.twitter.com/tmpchem LinkedIn: https://www.linkedin.com/in/tmpchem Imgur: https://tmpchem.imgur.com GitHub: https://www.github.com/tmpchem --- Equipment --- Microphone: Blue Yeti USB Microphone Drawing Tablet: Wacom Intuos Pen and Touch Small Drawing Program: Autodesk Sketchbook Express Screen Capture: Corel Visual Studio Pro X8
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