Q: If wavelength of radiation is 4000 A° = 400 nm then the energy of the photon is

Sol: $\large E = \frac{h c}{\lambda} = \frac{12400}{4000 A^o} eV$

E = 3.1 eV

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# If wavelength of radiation is 4000 A° = 400 nm then the energy of the photon is

Q: If wavelength of radiation is 4000 A° = 400 nm then the energy of the photon is

Sol: $\large E = \frac{h c}{\lambda} = \frac{12400}{4000 A^o} eV$

E = 3.1 eV