View Full Version : what is the relationship between stopping potential and the intensity of light?
tnecniv
Oct31-09, 12:49 PM
The higher the intensity of the light we will get a higher stopping potential.
Why is that so? is there any theory and formula to justifiy this behavior?
How is wavelength affecting the intensity of light?
Please advise.
Thank You
Fightfish
Oct31-09, 01:29 PM
Are you sure a higher intensity of light leads to a higher stopping potential? That is contrary to the photoelectric effect!
The wavelength and intensity of light are independent properties.
beakspyder
Nov9-10, 09:48 AM
Are you sure a higher intensity of light leads to a higher stopping potential? That is contrary to the photoelectric effect!
The wavelength and intensity of light are independent properties.
Well, theoretically it doesn't. I just did and experiment on this my result shows that when the intensity of light reduces, the stopping potential, albeilt slightly, reduces as well. Possibly because
stopping potential, eVo = KEmax = hf - Wo
and since Wo is dependant on the intensity of light, this will in turn affect our stopping potential. I might be wrong so...yeah..
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