what is ths no of photons of light with a wavelangth of 4000 pm that provided 1j energy.
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1) Number of photons is calculated by dividing total energy of 1 photons, so first calculate the energy of 1 photon by applying, E=hc/lembda
2) Then calculate the number of photons by using the formula, N=total energy/energy of one photon,
Wavelength, lembda = 4000 pm = 4000*10/100000000000000
energy of one photon,
E=hc/lembda= 6.626*10 to the power -34 Js*3.0*108 meter per second / 4000*10 to the power -12 m
= 4.9695*10 to the power -17 J
Number of photons,
N= 1J/4.9695*10 to the power -17J
= 2.0122*10 to the power 16 photons.
Hope it's help you.....
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