Answer to Question #277523 in General Chemistry for Tay

Question

The power output of a laser is measured by its wattage, the number of joules of energy it radiates per second (1 W = 1 J s-1). A 450.-mW argon laser produces a beam of blue light with a wavelength of 457.9 nm (4.579×10-7 m).

(a) Calculate the energy carried by each photon.

(b) Calculate the number of photons emitted by the laser per second.

(a)   J per photon

(b)  photons per second

Answer 1

The answer is provided in the image below