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guillefix
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I am doing my extended essay on the maths involved in GPS, and I am trying to understand the concept of the group velocity of a wave packet, http://www.mathpages.com/home/kmath210/kmath210.htm" they explain it more or less, but I still don't get how do they differenciate dw/dk to get c/n-ck/n^2(dn/dk), and in other book I read it says it is v+k(dv/dk). And what is exactly group velocity, the velocity of the envelope of the wave resulting from adding two waves or what?
Thank you for your help.
Thank you for your help.
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