# Physical units

1. Feb 13, 2016

### Amany Gouda

Excuse me,

If I want to calculate one equation in SI units. Which value of Boltzmann constant I should deal with.
Also, the electron temperature it can be used in Kev or it should be in ev.
Also, the nm must be converted to meter or it can be used in nanometer.

2. Feb 13, 2016

### Staff: Mentor

[PLAIN]https://upload.wikimedia.org/math/b/6/5/b656dca45e324f996659ee36a59c715e.png[/SIZE] [Broken]
What is the temperature of an electron? In general the SI units for temperature are K (Kelvin) or °C (Celsius).
eV is energy or sometimes the equivalent mass. SI unit is J (Joule).
nanometre is allowed but you can write $10^{-9}m$ instead.

Last edited by a moderator: May 7, 2017
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