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The electron, in a hydrogen atom, initially in a state of quantum number n1 makes a transition to a state whose excitation energy, with respect to the ground state, is 10.2 eV. If the wavelength, associated with the photon emitted in this transition, is 487.5 mm, find the (i) energy in ev, and (ii) value of the quantum number, n1 of the electron in its initial state.

The electron, in a hydrogen atom, initially in a state of quantum number n1
makes a transition to a state whose excitation energy, with respect to the
ground state, is 10.2 eV. If the wavelength, associated with the photon emitted
in this transition, is 487.5 mm, find the
(i) energy in ev, and (ii) value of the quantum number, n1 of the electron in its
initial state.

Grade:11

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