Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The electron energy in hydrogen atom is given by 
. Calculate the energy required to remove an electron completely from 
orbit. What is the longest wavelength (in cm) of light that be used to cause this transition?
Text Solution
Verified by ExpertsThe correct answer is:
3
(3.7 × 10 –5 cm)
Electron energy in the 2 nd orbit, i.e., 
,
and 
Change in energy 
.
Thus, energy required to remove an electron from 2 nd orbit
According to quantum equation,
Thus, the longest wavelength of light that can cause this transition is
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