if `lambda_(Cu)` is the wavelength of `K_alpha`, X-ray line fo copper (atomic number 29)
Channel: Doubtnut
Date: 05/07/2020

if `lambda_(Cu)` is the wavelength of `K_alpha`, X-ray line fo copper (atomic number 29) and `lambda_(Mo)` is the wavelength  of the  `K_alpha` X-ray line of molybdenum (atomic number 42), then the ratio `lambda_(Cu)/lambda_(Mo)`is  close to  (a) 1.99 (b)  2.14   (c ) 0.50 (d) 0.48