1. Feb 28, 2010 #1

   bonjour

   

   equals speed?
   
   I only ask as I couldn't find a solid answer online.

    

   bonjour, Feb 28, 2010
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3. Feb 28, 2010 #2

   Doc Al

   

   Staff: Mentor

   Yes, that's the basic wave relationship: Speed = Wavelength * Frequency
   
   See: http://hyperphysics.phy-astr.gsu.edu/HBASE/wavrel.html#c1"

    

   Last edited by a moderator: Apr 24, 2017

   Doc Al, Feb 28, 2010
4. Feb 28, 2010 #3

   bonjour

   

   Isn't calling C the speed of light in e=mc2 misleading as light is a specific part of the electromagnetic radiation spectrum.
   
   Shouldn't C be the speed ot the electromagnetic radiation spectrum

    

   bonjour, Feb 28, 2010
5. Feb 28, 2010 #4

   Doc Al

   

   Staff: Mentor

   Since all forms of electromagnetic radiation have the same speed in a vacuum, calling 'c' the speed of light is OK. Often all wavelengths, not just the visible, are referred to as 'light'.

    

   Doc Al, Feb 28, 2010
6. Feb 28, 2010 #5

   bonjour

   

   Right so then there would also be no objection to calling C the speed of gamma, or speed of infrared?

    

   bonjour, Feb 28, 2010
7. Feb 28, 2010 #6

   Doc Al

   

   Staff: Mentor

   Sure. No problem. All the same. Just calling it the 'speed of light' is more generic, though.

    

   Doc Al, Feb 28, 2010
8. Feb 28, 2010 #7

   bonjour

   

   http://www.chacha.com/question/how-...rays-when-both-speeds-are-measured-in-a-vacum
   
   Is this true?

    

   Last edited by a moderator: Apr 24, 2017

   bonjour, Feb 28, 2010
9. Feb 28, 2010 #8

   Doc Al

   

   Staff: Mentor

   Nope.

    

   Last edited by a moderator: Apr 24, 2017

   Doc Al, Feb 28, 2010

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