JEE Main 2019 — Atomic Physics Question with Solution
JEE Main 2019 (11 Jan Shift 1)
Question
A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength . The radius of the atom in the excited state, in terms of Bohr radius , will be:
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
Energy of photon
Energy of electron in orbit is given by
Electron will excite to We know that '
Radius of atom will be
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This is a previous-year question from JEE Main 2019, covering the Atomic Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.