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CGP EDU Academic Team
Published on: August 13, 2026
An electron in a H-atom in its ground state absorbs 1.5 times as much energy as the minimum required for its escape (13.6 eV) from the atom. What is wavelength of the emitted electron.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Energy absorbed = 1.5 × 13.6 = 20.4 eV.
Energy used up in escaping = 13.6 eV
∴ Energy left as KE with electron = 20.4 – 13.6 = 6.8 eV
∴ Associated de-Broglie wavelength, λ = 
= 4.71 Å.
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