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$\bullet$ In the photoelectric effect, what is the relationship between the threshold frequency $f_{0}$ and the work function $\phi ?$

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$\frac{\phi}{h}$

Physics 102 Electricity and Magnetism

Physics 103

Chapter 28

Photons, Electrons, and Atoms

Electromagnetic Waves

Atomic Physics

University of Washington

Hope College

University of Sheffield

Lectures

02:42

Atomic physics is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. It is primarily concerned with the arrangement of electrons around the nucleus and the processes by which these arrangements change. The theory of quantum mechanics, a set of mathematical rules that describe the behaviour of matter and its interactions, provides a good model for the description of atomic structure and properties.

03:50

In atomic physics, the Rutherford-Bohr model or Bohr model or Bohr model of the atom was first proposed by Niels Bohr in 1913. It was the first quantum theory of the atomic structure, applying the principles of quantum mechanics to the hydrogen atom. The Rutherford-Bohr model is a planetary model in which the electron is assumed to revolve around the nucleus in circular orbits. The Rutherford-Bohr model of the atom was based on Max Planck's quantum theory of radiation, which explained the spectrum of blackbody radiation, and Albert Einstein's theory of the photoelectric effect, which explained the origin of the spectrum of line emission from atoms. The Bohr model of the atom was the first to explain the discrete spectrum of hydrogen and how the spectral lines of the hydrogen atom were split into multiple spectral lines in a phenomenon called the fine structure. It introduced the Bohr radius and the concept of quantum levels to explain the discrete nature of the spectrum of the hydrogen atom. The Bohr model of the atom had a significant influence on the development of quantum mechanics, and was instrumental in the development and validation of quantum mechanics.

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The threshold wavelength f…

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(a) Explain what is meant …

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The threshold wavelength o…

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Threshold frequency for ph…

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The work function of a cer…

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In photoelectric effect ex…

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What is the relationship b…

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Which answer below correct…

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$\bullet$ The photoelectri…

Okay, so on this question, we're concerned with the threshold frequency and the work function. And so what is a threshold frequency? It would just be where you barely admit, um, electron. And so it would have, Ah, velocity, therefore of zero. And so, um, kind of going to the equation 38.3 tells us that the the following equation relates the velocity to the work function in the frequencies you have 1/2 M V squared is equal to H F minus five. So if we set this equals zero, then we get the work function is equal to age times half.

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