Class 12PhysicsDual Nature of Radiation and matterPhotoelectric Effect by Lenard and it's Observations
MediumDefine threshold frequency.
(N/A) The threshold frequency is defined as the minimum frequency of incident radiation (light) required to eject photoelectrons from the surface of a metal.
If the frequency of the incident light is less than the threshold frequency,no photoelectric emission occurs,regardless of the intensity of the light.
It is denoted by the symbol $\nu_0$ and is a characteristic property of the metal surface.
If the frequency of the incident light is less than the threshold frequency,no photoelectric emission occurs,regardless of the intensity of the light.
It is denoted by the symbol $\nu_0$ and is a characteristic property of the metal surface.
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"With increase in frequency of light incident, number of electrons emitted increase" - True or false?
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View SolutionLight of frequency $1.5 \nu_0$ (where $\nu_0$ is the threshold frequency) is incident on a photosensitive material. If the frequency is halved and the intensity is doubled,what happens to the photocurrent?
Consider the two following statements $A$ and $B$, and identify the correct choice given in the answers :
$(A)$ In photovoltaic cells, the photoelectric current produced is not proportional to the intensity of incident light.
$(B)$ In gas-filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.
$(A)$ In photovoltaic cells, the photoelectric current produced is not proportional to the intensity of incident light.
$(B)$ In gas-filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.
As the intensity of incident light increases,
The electrons are emitted in the photoelectric effect from a metal surface:
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