Questions
When the hydrogen atom emits a photon in going from n = 5 to n = 1 state, its recoil speed is nearly
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Correct option is C
Photon energy =hf=13.61−125eV=13eVPhoton momentum = momentum of hydrogen atom:⇒ p=hfc or mv=hfc⇒v=hfmc=Emc=13×1.6×10−191.67×10−27×3×108=4ms−1Similar Questions
Figure shows the energy levels P, Q, R, S and G of an atom where G is the ground state. A red line in the emission spectrum of the atom can be obtained by an energy level change from Q to S. A blue line can be obtained by following energy level change
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