The time before which we don’t know what happened in the universe (10-43 s) is called th...

The time before which we don’t know what happened in the universe (10^-43 s) is called the Planck time. The theory needed is a quantum theory of gravity and concerns the three fundamental constants h, G, and c. (a) Use dimensional analysis to determine the exponents m, n, l if the Planck time t^P = h^mGⁿc^l. (b) Calculate the Planck time using the expression you found in (a).