Question

What is the energy of a photon with a frequency of 3.17x10¹1 Hz?4.78x1044J2.09x10-45J2.10x10-22J2.09x10-23J

Answer 1

The energy of a proton is given by:

`E=hf`

where h is Planck's constant and f is the frequency. In this case the frequency is given, plugging the values we have:

`\begin{gathered} E=(6.6262*10^(-34))(3.17*10^(11)) \\ E=2.10*10^(-22) \end{gathered}`

Therefore, the energy is:

`E=2.10*10^(-22)\text{ J}`