Planck Time

on . Posted in Relativity

Planck time, abbreviated as \(t_p\), is a fundamental unit in the system of Planck units.  It is based on the speed of light, the energies needed to smash particles in the universe at a time equal to the Planck length and universal gravitational constant divided by the speed of light.  It is a useful unit in theoretical physics.

 

Planck Time Formula

\( t_p = \sqrt{  h\;G \;/\; c^5 } \) 
Symbol English Metric
\( t_p \) = Planck time (See Physics Constants) \(sec\) \(s\)
\( G \) = gravitational constant \(lbf-ft^2\;/\;lbm^2\)  \(N - m^2\;/\;kg^2\) 
\( h \) = Planck constant \(lbf-ft\;/\;sec\) \(J-s\)
 \( c \) = speed of light in vacuum  \(ft\;/\;sec\)  \(m\;/\;s\)

 

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