JEE Advanced 2014Paper 2
- Exam
- JEE Advanced
- Year
- 2014
- Paper
- Paper 2
- Subject
- Physics
- Chapter
- Electromagnetic Waves
JEE Advanced 2014 · Paper 2 · Physics · Electromagnetic Waves
If λ _ cu is the wavelength of K _ α X-ray line of copper (atomic...
If is the wavelength of X-ray line of copper (atomic number 29) is the wavelength of the X-ray line of molybdenum (atomic number 42), then the ratio is close to
Options
- A1.99
- B2.14
- C0.50
- D0.48
Correct answer
B. 2.14
Step-by-step solution
\dfrac{{\lambda}_{Cu}}{{\lambda}_{Mo}} = {\left(\dfrac{{Z}_{Mo} - 1}{{Z}_{Cu} - 1}\right)}^{2}