Question

1. Electrons in an x-ray tube accelerate through a
potential difference of 10.0 kV before striking a
target. If an electron produces one photon on impact
with the target, what is the minimum wavelength of
the resulting x-rays?
10:20​

Answer 1

Answer:

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).