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The photoelectrons emitted from a metal surface

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Important Questions on Dual Nature of Matter and Radiation

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The stopping potential as a function of frequency of incident radiation is plotted for two different photo electric surfaces A and B. The graphs show the work function of A is

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Light of wavelength 5000 A falls on a sensitive plate with photoelectric work function of 1.9eV. The kinetic energy of the photoelectron emitted will be

 

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In a photoemissive cell with exciting wavelength λ, the fastest electron has speed v. If the exciting wavelength is changed to 3λ/4, the speed of the fastest emitted electron will be
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When intensity of incident light increases
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If wavelength of a photon is 6000 Å, then its energy will be
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Work function a metal is 5.26×10-18 J then, its threshold wavelength will be :
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A radio station is transmitting the waves of wavelength 300 m. Radiation capacity of the transmitter is 10 kW. Find out the number of photons which are emitting in per unit time.

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The de Broglie wavelength of a particle accelerated with 150 V potential is 10-10 m. If it is accelerated by 600 V, then its wavelength will be: