petahertz


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pet·a·hertz

 (pĕt′ə-hûrts′)
n. Abbr. PHz
One quadrillion (1015) hertz.

petahertz

(ˈpɛtəˌhɜːts)
n
(Electronics) a very large unit of electrical frequency that is equivalent to one quadrillion hertz
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References in periodicals archive ?
X-rays at the short end of the spectrum are from 10 to 0.01 nanometers long with frequencies of 30 petahertz to 30 exahertz, and gamma rays are even shorter.
The rectifiers switch on and off at record high petahertz speeds, creating a small direct current.