Question

Nitrogen lazer produces a radiation at a wavelength of 337.1nm. If the number of photons emitted is `5.6×10^25` per second. Calculate the power of this laser?

Answer 1

`33.02\ "megawatts"`

Explanation:

`"P" = "Energy"/"Time"`

`color(white)("P") = ("nhc"/λ)/"t"`

`color(white)("P") = "nhc"/"λt"`

`color(white)("P") = (5.6 × 10^25 × 6.626 × 10^-34\ "J s" × 3 × 10^8\ "m/s")/(337.1 × 10^-9\ "m" × "1 s")`

`color(white)("P") = 33021892.6135\ "Watt"`

`color(white)("P") = 33.02\ "megawatts"`