00:01
In this particular question we have been asked to find out the minimum potential difference, the minimum potential difference to emit x -rays from this particular x -ray tube, right? here i have drawn an x -ray tube.
00:17
So we have to find out the potential difference required to emit x -rays, which have a wavelength which is given in this question, right? this data is given.
00:27
So the x -rays have a wavelength of 0 .250 meters, all right? and we have to find out the potential difference v, right? that is required to accelerate these electrons inside the x -ray tube, which will eventually strike the fluorescent screen and emit the x -rays.
00:50
Now, to solve this question, we will require this particular formula in which, ev is basically the kinetic energy of the electrons, right? the kinetic energy of electrons.
01:05
And v is the voltage here.
01:07
E is the charge of the electron.
01:09
All right.
01:10
So, ev is the kinetic energy of electrons.
01:14
H is basically your planks constant.
01:16
Right? we have studied about planks constant before.
01:21
And c is the speed of light...