The energy of a particular color of orange light is 3.19E-22 kJ.

If we have to find the wave length of the orange colour

wavelength is given by the formula

lamda=hxc/E where h is planck constant,c is the speed of light and E is the energy given in joules

wavelength in metres=6.62x10^(-34) Joules secx2.99x10^(8) metres/sec dividedby 3.19x10^(-19) joules

We have converted kj to joules

by using calculator

wavelength of orange colour =6.23x10^(-7)metres

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