QJEEM19Ph48b1: JEE Main 2019 Physics - Class 12 JEEM19Ph48b1 Solution: A hydrogen atom, initially in the ground state is excited by…

Question

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A hydrogen atom, initially in the ground state is excited by absorbing a photon of wavelength 980

\overset{\circ}{A}

. The radius of the atom in the excited state, in terms of Bohr radius a₀ will be : (hc = 12500 eV

\overset{\circ}{A}

)

Accepted Answer

Energy of photon

= \frac{12500}{980} = 12.75 e V

∴

Electron will excite to n = 4

Since 'R'

\propto

n²

∴

Radius of atom will be 16a₀

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