A 100 w sodium lamp radiates energy uniformly in all directions. The lamp is located at the center of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is $589\;nm$ what is the energy associated per photon with the sodium light ?

Question

$\begin{array}{1 1} 3.38 \times 10^{-19} \;KJ \\ 3.38 \times 10^{-19} \;J \\ 33.8 \times 10^{-19} \;KJ \\ 33.8 \times 10^{-19} \;KJ \end{array} $