Planck frequency

Noun

• A repeating event that occurs once every Planck time, with a frequency of $F\_p\; =\; \backslash sqrt\{\backslash frac\{c^5\}\{\backslash hbar\; G\}\}\; \backslash approx\; 1.855\; \backslash times\; 10^\{43\}\; \backslash mbox\{\; Hz\}.$ this frequency is said to be the upper bound for the frequency of an electromagnetic ray or cosmic rays.