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Key Equations

speed of light	$v = λ f$
constant value for the speed of light	$c = 3.00 \times 10^{8} m/s$

elapsed time	$Δ t = γ Δ t_{0}$
relativistic factor	$γ = \frac{1}{\sqrt{1 - \frac{u^{2}}{c^{2}}}}$
length contraction	$L = \frac{L_{0}}{γ}$
relativistic momentum	$p = γ m u$
relativistic energy	$E = γ m c^{2}$
rest energy	$E_{0} = m c^{2}$