A metal target with atomic number Z = 46 is bombarded with a high energy electron beam. The emission of X-rays from the target is analyzed. The ratio r of the wavelengths of the K α -line and the cu

Question

A metal target with atomic number Z = 46 is bombarded with a high energy electron beam. The emission of X-rays from the target is analyzed. The ratio r of the wavelengths of the K α ​ -line and the cut-off is found to be r = 2 . If the same electron beam bombards another metal target with Z = 41 , the value of r will be

TestHub · Accepted Answer

​ λ α ​ 1 ​ = 4 3 ​ R ( Z − 1 ) 2 p λ cut ​ = e V h c ​ ⇒ Ratio ∝ ( Z − 1 ) 2 1 ​ for same beam x Z ​ = 4 5 2 4 0 2 ​ ⇒ x = 4 0 2 4 5 2 ​ .2 ≈ 2.53 ​

Physics - Modern Physics Question with Solution | TestHub

Options:

Doubts & Discussion