Question

The potential difference between the cathode and the target in a coolidge tube is 120 kV. What can be the minimum wavelength (in Å) of the X-rays emitted by this tube?

(a) 0.4 Å 

(b) 0.3 Å 

(c) 0.2 Å 

(d) 0.1 Å

Answer 1

Correct answer is  (d) 0.1 Å