JEE Main201911 Jan 2019Evening ShiftPhysicsAtomic PhysicsActual
In a hydrogen like atom, when an electron jumps from the M-shell to the L-shell, the wavelength of emitted radiation is L . If an electron jumps from N -shell to the L -shell, the wavelength of emitted radiation will be:
Options
- A27 20
- B16 25
- C25 16
- D20 27
Correct answer
D. 20 27
Step-by-step solution
When electron jumps from M L shell 1 = K ( 1 2² - 1 3² )= K 5 36 When eletron jumps from N L shell 1 ^ =K ( 1 2² - 1 4² )= K 3 16 solving equation (i) and (ii) we get ^ = 20 27