Petahertz
A petahertz (symbol PHz) is a measure of frequency equal to a quadrillion hertz or a thousand terahertz.
In the electromagnetic spectrum, the low end of the petahertz range includes ultraviolet light, visible light, and infrared light, while the upper range includes X-rays and gamma rays.
See also SI prefix.
terahertz << petahertz << exahertz
Categories: Science stubs | Units of frequency