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What Change Will You Observe If Intensity of Incident Radiation is Changed but the Frequency Remains the Same? - Physics

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प्रश्न

What change will you observe if intensity of incident radiation is changed but the frequency remains the same?

उत्तर

 If intensity of incident radiation is changed but the frequency remains the same, the plot will be

If the intensity of incident radiation is changed but the frequency remains the same in this case the stopping potential remains unchanged.

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2016-2017 (March) Foreign Set 3

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संबंधित प्रश्‍न

The photoelectric work function for a metal surface is 2.3 eV. If the light of wavelength 6800A is incident on the surface of metal, find threshold frequency and incident frequency. Will there be an emission of photoelectrons or not?

[Velocity of light c = 3 x 108 m/s,

Planck’s constant, h = 6.63 * 10-34 Js ]


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Light of intensity ‘I’ and frequency ‘v’ is incident on a photosensitive surface and causes photoelectric emission. What will be the effect on anode current when the anode potential is increased? In each case, all other factors remain the same. Explain, giving justification in each case.


The graph shows the variation of stopping potential with frequency of incident radiation for two photosensitive metals A and B. Which one of the two has higher value of work-function? Justify your answer.


The work functions for potassium and caesium are 2.25 eV and 2.14 eV respectively. Is the photoelectric effect possible for either of them if the incident wavelength is 5180 Å?

[Given : Planck’s constant = 6.63 x 10–34 J.s.;
Velocity of light = 3 x 108 m/s; 1 eV = 1.6 x 10–19 J]


A beam of monochromatic radiation is incident on a photosensitive surface. Answer the following question giving reason :

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A beam of monochromatic radiation is incident on a photosensitive surface. Answer the following question giving reason :

Does the kinetic energy of the emitted electrons depend on the intensity of incident radiation?


What is photoelectri effect ? Defin (i) Stopping potential (ii) Photoelectric work function. 


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Light of wavelength 4000 Å is incident on two metals A and B. Which metal will emit photoelectrons, if their work functions are 3.8 e V and 1.6 e V respectively?


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