KCET2019PhysicsAtomic Physics
A hydrogen atom in ground state absorbs ( 10.2 eV ) of energy. The orbital angular momentum of the electron is increased by
Options
- A( 3.16 10⁻³⁴ Js )
- B( 1.05 10⁻³⁴ Js )
- C( 4.22 10⁻³⁴ Js )
- D( 2.11 10⁻³⁴ ~J _ S )
Correct answer
B. ( 1.05 10⁻³⁴ Js )
Step-by-step solution
(B) By absorbing ( 10.2 ev ), electron goes to ( 2 ) nd orbit as [ array l E₁=-13.6 eV E₂=-3.4 eV E₂-E₁=10.2 eV L₂-L₁= n₂ h 2 - n₁ h 2 = 2 h 2 - h 2 = 6.62 10⁻³⁴ 2 3.14 =1.05 10⁻³⁴ Js array ]