# Not as "light" as it looks

In photoelectric effect, we have the equations for particle nature of light i.e., for photons,

\[p = \frac{h}{\lambda}\] \[E = pc\]

where,

\(p\) is the momentum of a photon

\(E\) is the energy of a photon

\(c\) is the speed of light in air

\(h\) is the Planck's constant

\(\lambda\) is the wavelength of the light

Hence we can conclude that ,