Electromagnetic radiation Definition and 159 Threads

newtoPF-how do you delete this thread? i wasn't sure about where to post...sorry for double posting...but how do you delete this anyways...?

Please help me answer these questions~~~thank you~~ In October, 2004, the Canadian Light Source (CLS) was officially opened. This device is a synchrotron. It produces electromagnetic radiation that can be used to probe the structure of materials. 1. Explain how electric and magnetic fields...

Please help me answer these questions~~~thank you~~ In October, 2004, the Canadian Light Source (CLS) was officially opened. This device is a synchrotron. It produces electromagnetic radiation that can be used to probe the structure of materials. 1. Explain how electric and magnetic fields...

Hi, I'm looking into electromagnetic radiation at the moment and something has just entered my head. If its true that an electron will not radiate unless its velocity changes with time then could this property be used to determine absolute rest. That is, how can we know that if something is...

A celebrity holds a press conference, which is televised live. A television viewer hears the sound picked up by a microphone directly in front of the celebrity. This viewer is seated 2.1 m from the television set. A reporter at the press conference is located 4.1 m from the microphone and hears...

Please help uncloud my understanding #1.Why does the Earth cool off much more quickly when the weather is clear than cloudy? My foggy understanding: The cloud cover “traps” the heat energy radiated from the Earth because water has a high heat capacity, and so takes a longer time to heat up...

You may find this poster of "The Electromagnetic Radiation Spectrum" of interest. http://unihedron.com/projects/spectrum/ This poster includes all known ranges of EMR including Gamma Rays, X-Rays, Ultraviolet light, Visible light, Infrared, Microwaves, Radio waves (ULF, VLF, LF, MF...

Calculate the longest wavelength of electromagnetic radiation that could ionize an atom of each of the following elements: a) Li; IE1=520.1 kJ/mol can some one tell me the steps to do this problem. thanks

I need help with the following questions. 1.A microwave oven produces electromagnetic radiation at lambda = 12.3cm and produces a power of 764W. Calculate the number of microwave photons produced by the microwave oven each second. 2.Compton used photons of wavelength 71.3 pm. (a)...