Class 12PhysicsDual Nature of Radiation and matterPhotoelectric Effect by Lenard and it's Observations
MediumWrite the characteristics of the photoelectric effect.
(N/A) $(i)$ For a given photosensitive substance, when the frequency of incident radiation is greater than the threshold frequency, the photoelectric current is directly proportional to the intensity of light.
$(ii)$ For a given photosensitive substance and frequency of incident radiation, the saturation current is proportional to the intensity of radiation, but the stopping potential is independent of the intensity.
$(iii)$ For a given photosensitive substance, if the frequency is less than the threshold frequency, photoelectric emission will not take place, regardless of the intensity of radiation.
$(iv)$ For a frequency greater than the threshold frequency $(v > v_{0})$, the stopping potential and maximum kinetic energy vary linearly with the frequency of the incident radiation, but they do not depend on the intensity of the radiation.
$(v)$ Photoelectric emission is an instantaneous process, occurring within a time interval of $10^{-9} \,s$ or less.
$(ii)$ For a given photosensitive substance and frequency of incident radiation, the saturation current is proportional to the intensity of radiation, but the stopping potential is independent of the intensity.
$(iii)$ For a given photosensitive substance, if the frequency is less than the threshold frequency, photoelectric emission will not take place, regardless of the intensity of radiation.
$(iv)$ For a frequency greater than the threshold frequency $(v > v_{0})$, the stopping potential and maximum kinetic energy vary linearly with the frequency of the incident radiation, but they do not depend on the intensity of the radiation.
$(v)$ Photoelectric emission is an instantaneous process, occurring within a time interval of $10^{-9} \,s$ or less.
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Assertion $A :$ In photoelectric effect,on increasing the intensity of incident light,the stopping potential increases.
Reason $R :$ Increase in intensity of light increases the rate of photoelectrons emitted,provided the frequency of incident light is greater than threshold frequency.
In the light of the above statements,choose the correct answer from the options given below:
Assertion $A :$ In photoelectric effect,on increasing the intensity of incident light,the stopping potential increases.
Reason $R :$ Increase in intensity of light increases the rate of photoelectrons emitted,provided the frequency of incident light is greater than threshold frequency.
In the light of the above statements,choose the correct answer from the options given below:
When yellow light is incident on a surface,no electrons are emitted,while green light can emit them. If red light is incident on the surface,then:
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