question_answer 65)

Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is\[5.6\times {{10}^{24}}\], calculate power of this laser.

Answer:

\[E=x\,h\frac{c}{\lambda },x=\] = number of photons \[=\frac{5.6\times {{10}^{24}}\times 6.6\times {{10}^{-34}}\times 3\times {{10}^{8}}}{337.1\times {{10}^{-9}}}\] \[=3.289\times {{10}^{6}}\text{J}\]