Voltmeter to Measure Light Intensity

[GUDDU]

measure of light intensity using a voltmeter?
relationship between voltage and light intensity

 

[Calrid]

measure of light intensity using a voltmeter?
relationship between voltage and light intensity

You need the http://en.wikipedia.org/wiki/Photoelectric_effect" it varies according to material. So I can't really say more than that without knowing the wavelength of light and the material in question.

Experimental results of the photoelectric emission

1. For a given metal and frequency of incident radiation, the rate at which photoelectrons are ejected is directly proportional to the intensity of the incident light.
2. For a given metal, there exists a certain minimum frequency of incident radiation below which no photoelectrons can be emitted. This frequency is called the threshold frequency.
3. For a given metal of particular work function, increase in intensity of incident beam increases the magnitude of the photoelectric current, though stoppage voltage remains the same.
4. For a given metal of particular work function, increase in frequency of incident beam increases the maximum kinetic energy with which the photoelectrons are emitted, but the photoelectric current remains the same, though stoppage voltage increases.
5. Above the threshold frequency, the maximum kinetic energy of the emitted photoelectron depends on the frequency of the incident light, but is independent of the intensity of the incident light so long as the latter is not too high [5]
6. The time lag between the incidence of radiation and the emission of a photoelectron is very small, less than 10−9 second.
7. The direction of distribution of emitted electrons peaks in the direction of polarization (the direction of the electric field) of the incident light, if it is linearly polarized