when ever i try to read about E of light. i get the Plank's formula (E=hc/Wave length). but, if the light is made of photons of different wave lengths, how would i be able to calculate E?
To calculate this you need to know the distribution of photons between the wavelengths. This is a spectra of the light. Often you find the distribution in intervals of 1, 2 or 5 nm.
Calculate the energy for the middle of each wavelength interval in the spectra and sum them with the weight of the spectra.
To calculate this you need to know the distribution of photons between the wavelengths. This is a spectra of the light. Often you find the distribution in intervals of 1, 2 or 5 nm.
Calculate the energy for the middle of each wavelength interval in the spectra and sum them with the weight of the spectra.
Examples of how this is calculated can be found in some of the papers and especially the Ultraviolet Applications Handbook by James R Bolton.
Book Ultraviolet Applications Handbook
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