E = hc/lambda
h = Planck's constant = 6.626 x 10^-34 J*s.
c is speed of light = 3 x 10^8 m/s.
lambda is 325 nm. Put this in meters.
E = Joules for 1 photon = xx.
Then (xxJ/1 photon) = (1.00 mJ/?)
Solve for ?. Be sure and put 1.00 mJ in as J.
One type of sunburn occurs on exposure to UV light wavelength in the vicinity of 325nm.
How many photons are in 1.00 mJ burst of this radiation?
2 answers
1.64*10^15
3 answers