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Units for E

Posted: Sun Oct 13, 2019 11:21 am
by Labiba Sardar 2A
Is the unit for E always implied as being J/atoms or J/photons?

Re: Units for E  [ENDORSED]

Posted: Sun Oct 13, 2019 12:01 pm
by Ryan Yee 1J
Since this equation applies to light, it would be J/photon.

Re: Units for E

Posted: Wed Oct 16, 2019 6:41 pm
by Maeve Miller 1A
Yes, energy is measured in joules (E); for most problems, you'll answer with J/photon, but in problems asking for the energy per atom, you'll need to multiply by Avogadro's number and answer in J/atom.

Re: Units for E

Posted: Thu Oct 17, 2019 11:59 am
by VPatankar_2L
Energy in the situations that discuss light is considered as J/photon. If the energy is provided in eV (electron Volts), you will have to convert it to J/photon. The conversion factor is about 1 eV = 1.6 *10^-19 J/photon.

Re: Units for E

Posted: Sun Oct 20, 2019 2:07 pm
by Presley Gao 2C
The unit for E is always implied as being J / photons, but if you want to convert to J / atoms, you must use Avogadro's number.