Question

What is the value of Planck’s constant used to calculate photon energy?

Options

• \[6.626\times10^{-34}\ \mathrm{J}\]

• \[6.626\times10^{34}\ \mathrm{J\,s}\]

• \[6.626\times10^{-34}\ \mathrm{Hz}\]

• \[6.626\times10^{-34}\ \mathrm{J\,s}\]

Answer 1

Planck’s constant is \[h=6.626\times10^{-34}\ \mathrm{J\,s}\]. Multiplying it by frequency gives the energy of one photon.