JEE Advanced2024PhysicsElectromagnetic WavesActual
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_ -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
Options
- A2.53
- B1.27
- C2.24
- D1.58
Correct answer
A. 2.53
Step-by-step solution
( aligned & 1 _ = 3 4 R(Z-1)^2 p & _ cut = h c e V & Ratio 1 (Z-1)^2 for same beam & Z x = 40^2 45^2 & x= 45^2 40^2 .2 2.53 aligned )