How many photons are required to provide 1 , | vedclass

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Question

(C) The energy of $n$ photons is given by the formula: $E = \frac{nhc}{\lambda}$.Rearranging for $n$: $n = \frac{E 	imes \lambda}{hc}$.Given: $E = 1

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$2.5 	imes 10^{18}$

Vedclass · Answer

(C) The energy of $n$ photons is given by the formula: $E = \frac{nhc}{\lambda}$.Rearranging for $n$: $n = \frac{E 	imes \lambda}{hc}$.Given: $E = 1 \, J$,$\lambda = 5000 \, \mathring{A} = 5000 	imes 10^{-10} \, m$,$h = 6.626 	imes 10^{-34} \, J \cdot s$,$c = 3 	imes 10^8 \, m/s$.Substituting the values: $n = \frac{1 	imes 5000 	imes 10^{-10}}{6.626 	imes 10^{-34} 	imes 3 	imes 10^8}$.$n = \frac{5 	imes 10^{-7}}{1.9878 	imes 10^{-25}} \approx 2.515 	imes 10^{18}$.Thus,the correct option is $C$.

How many photons are required to provide $1 \, J$ of energy with a wavelength of $5000 \, \mathring{A}$?

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