Planck-Einstein Equation

Definition §

Note Energy of a photon

$$E=hf$$

• $E$ = Total Energy (in $\text{J}$)
• $h$ = Planck’s consant $\approx 6.63\times 10^{-24}\text{ Js}$
• $f$ = Frequency (in $s^{-1}$ or $\text{Hz}$)