kerosene Experiment?|| @MR.INDIAN HACKER {Shorts} don't try this experiment at home|| #shorts

T.W Engelmann experimented on

You called on me when I was not at home, don't you?

In the Coolidage tube experiment, if the applied voltage is increased to three times, the short wavelength limit of continuous X- ray spectrum shift by 20 pm. What is the intial voltage (in kV) applied to the tube?