Question

What is the equation for the energy of a photon? a) E = mc^2 b) E = hf c) E = 1/2 mv^2 d) E = GmM/r

Answer 1

`E = h\, f`, where
`h` is Planck's Constant and
`f` is the frequency of this photon.

Step-by-step explanation:

The energy
`E` of a photon is proportional to its frequency. This relationship is known as Planck's Relation:

`E = h\, f`,

Where:

• 
  `h \approx 6.626 * 10^(-34)\; {\rm J \cdot s}` is Planck's Constant, and
• 
  `f` is the frequency of this photon.