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The electrons are emitted in the photoelectric effect from a metal surface. - Physics

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Question

The electrons are emitted in the photoelectric effect from a metal surface.

Options

  • only if the frequency of radiation is above a certain threshold value.

  • only if the temperature of the surface is high.

  • at the that is independent of the nature of metal.

  • with a maximum velocity proportional to the frequency of incident radiation

MCQ
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Solution

The electrons are emitted in the photoelectric effect from a metal surface only if the frequency of radiation is above a certain threshold value.

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Chapter 14: Dual Nature Of Radiation And Matter - MCQ’S

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SCERT Maharashtra Physics [English] 12 Standard HSC
Chapter 14 Dual Nature Of Radiation And Matter
MCQ’S | Q 1

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Given the following data for incident wavelength and the stopping potential obtained from an experiment on the photoelectric effect, estimate the value of Planck's constant and the work function of the cathode material. What is the threshold frequency and corresponding wavelength? What is the most likely metal used for emitter?

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