Wavelenght = 253.7 nm = 253.7 x 10^-^9 m
Energy of photon associated with this wavelength,
= [tex] \frac{\text{Planck's constant X speed of light}}{\text{wavelenght}} [/tex]
= [tex] \frac{6.629X10^-^3^4X3X10^8}{253.7X10^-^9} [/tex]
= 7.838 X [tex] 10^{-19} [/tex] J
Thus, energy required to rupture C-I bond is 7.838 X 10^(-19) J
