NTA Abhyas JEE Main2020PhysicsAtomic PhysicsPractice
Let λ α , λ β and λ α ′ denote the wavelengths of the X-rays of the K α , K β and L α lines in the characteristic X-rays for a metal. Then,
Options
- A1 λ β = 1 λ α + 1 λ α ′
- B1 λ ' α = 1 λ β + 1 λ α
- C1 λ α = 1 λ β + 1 λ ' α
- Dλ α = λ β + λ ' α
Correct answer
A. 1 λ β = 1 λ α + 1 λ α ′
Step-by-step solution
E L − E K = hc λ α ...(i) E M − E K = hc λ β ...(ii) E M − E L = hc λ α ' ...(iii) ( ii ) − ( i ) ⇒ E M − E L = hc λ α ' = hc λ β − hc λ α 1 λ β = 1 λ α + 1 λ α '