Question

In a Coolidge tube, the potential difference used to accelerate the electrons is increased from 12.4 kV to 24.8 kV. As a result the difference between l_Ka and l_min increases three fold. The wavelength of K_ line is - ($\frac{hc}{e}$ = 12.4 kV Å)

• A. 1 Å
• B. 1.25 Å
• C. 1.5 Å
• D. None of these

Answer 1

Answer: (B)

1.25 Å

Answer 2

l_Ka will not change.