units for energy

[Elyssa Smith 4B]

What are the units for energy in the E=hv equation? Is it Joules or Joules/photon?

[Anika Chakrabarti 1A]

The unit is J, but in the E=hv equation you are finding the energy of a photon, so technically this value means the amount of energy per photon. I think you can just write J in your answer though.

[Jared Khoo 1G]

The unit for energy is Joules, which is equivalent to a Newton*meter. Planck's constant h is in the units of m²kgs^-1 and the unit for v frequency v is s^-1. Multiplying these together you would get m²kgs^-2. As a newton is in the units of kgms^-2, you can see that this equation indeed does find Joules, or N*m.