A potential diffrence , the `20kv` is applied across an X- ray s tube . The minimum wavelength of x- ray generated is …….` Å` .

Explanation

The X-rays produced under an accelerating poptential `V` will have varying wavelength with the minimum due to the entire energy of the accelerated electron being lost in a single collision with the larget atoms. Here , the shortest wavelength generated of X-ray can be given by
`lambda_( c) = (12431)/(V) Å = (12431)/(20000) = 0.6215 Å`