A nanojoule (nJ) is an SI submultiple of the joule, equal to 10⁻⁹ joules. It is formally used in physics and engineering to describe minute energy transfers, such as the energy per pulse in ultrafast optics or the switching energy of logic gates in advanced semiconductor nodes.
Heard on the job
The laser emits 50 nanojoule pulses at a repetition rate of 100 megahertz.
Also heard as
- nJ
- nano-joule