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प्रश्न
Draw a graph between the frequency of incident radiation (υ) and the maximum kinetic energy of the electrons emitted from the surface of a photosensitive material state clearly how this graph can be used to determine (i) Planck’s constant and (ii) work function of the material.
उत्तर
(i) Plank constant is given by slope of the curve i.e.
`h =(ΔKE)/(Deltav)`
(ii) Work function is the minimum energy required by the electron to escape out of the metal surface thus,
Φ = hν° Here, ν° is the threshold frequency
संबंधित प्रश्न
Plot a graph showing the variation of photoelectric current with intensity of light. The work function for the following metals is given:
Na: 2.75 eV and Mo : 4.175 eV.
Which of these will not give photoelectron emission from a radiation of wavelength 3300
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Write two characteristic features observed is photoelectric effect which supports the photon pictures of electromagnetic radiation ?
The photocurrent in an experiment on photoelectric effect increases if ______.
Define the following with reference to photoelectric effect :
(a) Threshold frequency (`f_0`)
(b) Stopping potential (`V_s`)
Photoelectric effect is ______.
Lenard observed photoelectric effect using
Which one of the following metals does not exhibit emission of electrons from its surface when irradiated by visible light?
In an experiment on photo electric effect, how does stopping potential change, if at all, when intensity of incident monochromatic UV radiation is increased?
