quickclick330
Oct16-07, 04:35 PM
This is a somewhat simple question I'm just unsure what relations to use. I found an equation relating number of protons to power and frequency but i'm not sure how to apply it to this case.
EQUATION?
Power = energy per unit time
= (energy per photon) * (photon per unit time)
= (h*f) * (photons per unit time)
*where*
Power = wattage
h = Planck's constant
f = frequency.
QUESTION
A certain laser outputs pure red light (photon energy 1.8 eV) with power 550 milliwatts (0.55 watts). How many photons per second does this laser emit?
photons/s
-Thanks!!
EQUATION?
Power = energy per unit time
= (energy per photon) * (photon per unit time)
= (h*f) * (photons per unit time)
*where*
Power = wattage
h = Planck's constant
f = frequency.
QUESTION
A certain laser outputs pure red light (photon energy 1.8 eV) with power 550 milliwatts (0.55 watts). How many photons per second does this laser emit?
photons/s
-Thanks!!