Back to Home

Blackholes2 Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Blackholes II | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: The Electric Field Of An EM Wave

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by yelmalio/">yelmalio on January 26, 2000 08:07:53 UTC

Can a distant charged particle feel the effect of the E field created by the time varying B field in the EM wave?

Yes it can. It is better to think of the propagating wave as an EM wave rather than seperate E and B components, they are indistinguishable. This wave will have a frequency f that can has an energy E=hf, h is plancks constant.

The seperate charged particle (an electon say) also has an energy E=mc^2 (more properly it should be E^2= m^2 * c^4 + p^2 * c^2 but I'm trying to keep the maths simple to get the idea across) but this can be considered to be a wave with wavelength f=mc^2/h. Interference can then occur and the charged article can absorb and re-emit the energy in the propagating wave. This is an example of Compton Scattering.

A more detailed and accurate treatment can be found at www.treasure-troves.com/physics/ComptonEffect.html

Follow Ups:

    Login to Post
    Additional Information
    Google
     
    Web www.astronomy.net
    DayNightLine
    About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
    Unless otherwise specified, web site content Copyright 1994-2020 John Huggins All Rights Reserved
    Forum posts are Copyright their authors as specified in the heading above the post.
    "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
    are trademarks of John Huggins