Calculate the wavelength, in metres, of a photon capable of exciting an electron in He+ from the ground state to n=4... Someone please tell me the right answer urgently :( ?
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Expert's answer
2012-11-06T07:35:54-0500
Energy levels for the hydrogen-like He+ are given by E(n) = -Z2*R/n2, where Z = 2;
Energy of an absorbed photon between the levels n=1 and m=4 E(m,n) = Z2*R*(1/n2 - 1/m2)
We will take R = 10973731.6 m-1, Rydberg constant for H, in reciprocal meters.
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