1. A unit of frequency equal to one quintillion (10^18) hertz, used in physics and telecommunications to measure extremely high-frequency electromagnetic waves.
Usage: technical; plural: exahertz or exahertzs; abbreviation: EHz

Examples

• Researchers measured the frequency of the X-ray beam in exahertz.
• The laser operated at several exahertz, placing it in the ultraviolet spectrum.
• Terahertz and exahertz frequencies are used in advanced imaging technologies.
• The electromagnetic wave had a frequency of 0.5 exahertz.
• Scientists study materials at exahertz frequencies to understand their optical properties.