Question

The minimum energy necessary to overcome the attractive force between the electron and the surface of silver metal is 7.52 × 10^−19 J. What will be the maximum kinetic energy of the electrons ejected from silver which is being irradiated with ultraviolet light having a wavelength 360 Å?


How to solve this?​

Answer 1

Answer:

This is essentially the question from modern atomic physics and specifically the question is from photo electric effect.

Now, just consider this equation and I suggest commit it to your memory so, that the work further will be easier.

Energy provided by the photon = Work function(Minimum energy needed to be ejected from the surface) + Maximum kinetic energy without any relativstic corrections.

So,

Wavelength of the light wave provided = 360 A° = 3.6 * 10^-8 m

So,

Energy = hc/wavelength = 6.626*10^-34 * 3*10^8/3.6*10^-8

So, from here you can further calculate this value.

So,

Energy given = 7.52 *10^-19 + Kinetic energy

So, from here by placing the value found out of the energy given, you can easily find the required magntiude of the maximum kinetic energy.