Question

Select One Option Correct from the following :If $\lambda_{Cu}$ is the wavelength of $K_\alpha$ X-ray line of copper (atomic number 29) and $\lambda_{Mo }$ is the wavelength of the $K_\alpha$ X-ray line of molybdenum (atomic number 42), the the ratio $\lambda_{Cu}/\lambda_{Mo}$ is close to
(A)1.99
(B)2.14
(C)0.50
(D)0.48

Answer 1

the answer is the c part in the question