A cue ball of inertia m is given a speed v before it collides elastically with a full rack of 15 stationary balls in a game of p
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Answer: 345600 J
Explanation: solution attached
KE= 1/2 mv²
The wavelength of the light beam required to turn back all the ejected electrons is 497 nm which is option (b).
- Work function is a material property defined as the minimum amount of energy required to infinitely remove electrons from the surface of a particular solid.
- The potential difference required to support all emitted electrons is called the stopping potential which is given by
.....(1)
- where
is the stopping potential and e is the charge of the electron given by
.
It is given that work function (Ф) of monochromatic light is 2.50 eV.
Einstein photoelectric equation is given by:
....(2)
where K.E(max) is the maximum kinetic energy.
Substituting (1) into (2) , we get
As we know that ....(3)
where Speed of light, and Planck's constant ,
From equation (3) , we get
Learn about more einstein photoelectric equation here:
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