First slide
Wave nature of matter
Question

As energy associated with changes with its wavelength, often the reciprocal of the wavelength 1/λ. is used to describe energy associated with that wavelength. Then, mark the correct equivalence.

Moderate
Solution

 As,  hf=E hcλ=E  1λ=Ehc Now, hc1240eVnm hc1240×107eVcm So,  1λ=1eV1240×107eVcm( when E=1eV)=8065.8cm1

So, a wave length reciprocal 1λ of 8065.8 cm-1 corresponds to an energy of 1 eV.

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