Nitrogen laser produces a radiation of a wavelength of 337.1 nm. If th

1.	Nitrogen laser produces a radiation of a wavelength of 337.1 nm. If the number of photons emitted is 5.6 x 1024, calculate the power of this laser
Answer» Energy of one photon E = hv = hc/λ = {6.626 x 10^-34 Js x 3 x 10⁸ ms^-1}/{337.1 x 10^-9 m} = 5.89 x 10^-19 J Power of the laser = 5.89 x 10^-19 J x 5.6 x 10²⁴ = 32.98 x 10⁵ Js^-1 = 32.98 x 10⁵ Watt

Nitrogen laser produces a radiation of a wavelength of 337.1 nm. If the number of photons emitted is 5.6 x 1024, calculate the power of this laser

Answer»

Energy of one photon

E = hv = hc/λ = {6.626 x 10^-34 Js x 3 x 10⁸ ms^-1}/{337.1 x 10^-9 m}

= 5.89 x 10^-19 J

Power of the laser = 5.89 x 10^-19 J x 5.6 x 10²⁴

= 32.98 x 10⁵ Js^-1

= 32.98 x 10⁵ Watt