Chapter2_3 - . 4 10 626 . 6 with ) 2 /( h = h and where = 2...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
PHY3063 R. D. Field Department of Physics Chapter2_3.doc University of Florida Particles with Zero Rest Mass (Photons) Case 1 (m 0 > 0): In this case 2 2 0 2 2 ) ( ) ( c m cp E + = with 2 2 2 z y x p p p p + + = and 1 ) ( ) ( 2 2 0 2 < + = = = c m cp cp E cp c v β . Case 2 (m 0 = 0): In this case cp E = with 2 2 2 z y x p p p p + + = and 1 = = = E cp c v . Also, c p c E m = = 2 . Photons: Photons have zero rest mass and ( as we will see ) there energy is related to the frequency, f, of their oscillations as follows: ω h = = hf E , where h is Planck’s constant s eV s J h × = × = 15 34 10 136
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . 4 10 626 . 6 with ) 2 /( h = h and where = 2 f is the angular frequency. The momentum of a photon is given by k h p h = = , where is the wavelength of the photon and k is the wave number (k=2 / ). We see that 2 2 c hf c E m = = and c p E h E p h f = = = . Relativistic Mass m &gt; 0 implies &lt; 1! m = 0 implies = 1! Photon Relativistic Mass!...
View Full Document

This note was uploaded on 05/29/2011 for the course PHY 3063 taught by Professor Field during the Spring '07 term at University of Florida.

Ask a homework question - tutors are online