SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An excited state of an atom has an energy level of 2.5 eV. The ground state of this atom is at 1.1 eV. Which is the maximum energy of a photon emitted then an electron moves from the excited state to the ground state?
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1.1 eV
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1.4 eV
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2.5 eV
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3.6 eV
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Explanation:
Detailed explanation-1: -An electron in an excited state of hydrogen atom absorbs 2.5 times the energy needed to unbound the electron and moves with a wavelength of 5.416 Å (h=6.6×10−34Js)
Detailed explanation-2: -An electron is at ground state of the H atom. Minimum energy required to excite the H atom into second excited state is: Q. The energy required to iononise a hydrogen like ion in its ground state is 9 Rydbergs.
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