Ruby Laser Quantom Theory Does anyone know what formulas I would use to solve this equation?!?
A ruby laser produces radiation of wavelength 633 nm in pulses whose duration is 1.00x10E-9 s.
a) if the laser produces .376J of energy per pulse, how many photons are produced in each pulse?
b) Calculate the power (in watts) delivered by the laser per pulse. (1 watt=1J/s)
The wavelength (lambda) of each photon produced by the laser is 633 nm = 633 * 10-9 m. The frequency (nu) is therefore c/lambda = (2.9979 * 10^8 m/s)/(633 * 10-9 m) = 4.736 * 10^14/s. The energy associated with each photon is Planck's constant h times the frequency; E = h * nu = 6.626 * 10^-34 J-s * 4.736 * 10^14/s = 3.138 * 10^-19 J. Since each pulse is 0.376 J, the total number of photons in each pulse is (0.376 J / 3.138 * 10^-19 J/photon) = 1.198 * 10^18 photons. Round this to 1.20 * 10^18 to make sure your significant figures are consistent.
Each pulse is 0.376 J delivered in 1.00 * 10^-9 s.
Power P = energy / time = 0.376J/1.00 * 10^-9 s
=3.76 * 10^8 watts, or .376 gigawatts
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High Energy Ruby Laser in Action
are rubies used in lasers?
Rubies are used in certain types and mavelengths of lasers. These can be either man made or naural. There are many ways to manufacture lasers. For a bit of info on lasers, I recommend contacting Edmund Scientific and they sell the things for very reasonable prices. They also are a good source for general information on light and optics.
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