Calculate the wavelength of a photon in Angstrom units having enery of

1.	Calculate the wavelength of a photon in Angstrom units having enery of one electron volt.
Answer» SOLUTION :`E = 1 eV = 1.609 xx 10^(-19) J` `E = hv = h (C)/(lamda)` or `lamda = (hc)/(E) = ((6.62 xx 10^(34) Js) (3 xx 10^(8) ms^(-1)))/(1.602 xx 10^(-19) J) = 12.40 xx 10^(-7) m = 12.40 xx 10^(3) Å`

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