Question

The wavelength of X-rays is of the order of

1nm
none of these
10nm
0.1nm​

Answer 1

Explanation:

If electrons are accelerated to a velocity v by a potential difference V and then allowed to collide with a metal target, the maximum frequency of the X-rays emitted is given by the equation:

mv

2

=eV=hν

or, λ

min

=

10

3

1240

∗10

−9

=124nm=12.4A

∘

So, the answer is option (D).