221111(/)vcγ=⇒=−γ−which implies that the difference between vand cis 22112cvcc⎛⎞−=− −≈+⎜⎟γγ⎝⎠"where we use the binomial expansion (see Appendix E) in the last step. Therefore, (299792458m s) 0.0266m s2.7cm s22(75000)−≈==≈γ. 7. From Eq. 37-48, the Lorentz factor would be
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