Metallic Reflection: Wiggling Electrons
{"Image DocumentName": "Metallic Reflection: Wiggling Electrons", "Image ImageDescription": "Microwaves. 05/18/2006. UCSD: Physics 8; Metallic Reflection: Wiggling Electrons. Why does metal reflect EM waves? because the surface electrons are made to vibrate with the oscillating E-field. this acceleration of the electron itself produces electromagnetic radiation. phase is such that transmitted wave is perfectly canceled. So the microwave has all these metal (reflective) walls, which keeps the microwaves inside. But how does the mesh on the front door do the job? after all, light can get through, and light is also EM radiation. Key issue is: can electrons redistribute themselves quickly enough? for a certain frequency of EM radiation, need charge redistribution on timescale shorter than wave period. Lecture 14. Spring 2006.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}