Question

A sample of carbon disulphide ( molar volume 6.04× 10^-5 m^3 mol^-1) is irradiated by a Q- switched ruby laser (operational wavelength 694nm) giving peak intensities of 1.6 × 10^16 W m^-2. At the moment of peak intensity, what is the average number of photons travelling through the region of space occupied by one molecule?
(h = 6.63 × 10^-34Js, c= 3.00 × 10^8 ms^-1, L= 6.02 × 10^23 mol^-1)

Answer 1