Q. The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is
A) $1.602 \times 10^{- 14}J$
B) $1.619 \times 10^{- 16}J$
C) $1.632 \times 10^{- 18}J$
D) $1.656 \times 10^{- 20}J$
Explanation
(c) Energy to excite the $e^{-}$ from $n = 1$ to $n = 2$
$E = - 3.4 - ( - 13.6) = 10.2eV = 10.2 \times 1.6 \times 10^{- 19}$
$= 1.632 \times 10^{- 18}J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.