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Suppose that the light carries energy Elight. What is the maximum stopping potential Vo that can be applied while still allowing electrons to reach the detector? Express your answer in terms e, Elight, and o.

Suppose that the light carries energy Elight. What is the maximum stopping potential Vo that can be applied while still allowing electrons to reach the detector? Express your answer in terms e, Elight, and o.

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Learning Goal: To understand the experiment that led to the discovery of the photoelectric effect. In 1887, Heinrich Hertz investigated the phenomenon of light striking a metal surface, causing the ejection of electrons from the metal. The classical theory of electromagnetism predicted that the energy of the electrons ejected should have been proportional to the intensity of the light. that the of the electrons was f of the intensity of the light. Furthermore, for low enough frequencies, no electrons were ejected, no matter how great the intensity of the light became. The following problem outlines the methods used to investigate this new finding in physics: the photoelectric effect. For the incident light to cause the ejection of an electron, the light must impart a certain amount of energy to the electron to overcome the forces that constrain it within the metal. The minimum amount of energy required to overcome these forces is called the work function . Different metals will have different values for ø. For an electron to reach the detector, the light must impart enough energy for the electron to overcome both the work function and the stopping potential. Part B Suppose that the light carries energy Elight. What is the maximum stopping potential V₁ that can be applied while still allowing electrons to reach the detector? Express your answer in terms e, Elight, and . ► View Available Hint(s) Vo = ΠΙ ΑΣΦ ?
Transcribed Image Text:Learning Goal: To understand the experiment that led to the discovery of the photoelectric effect. In 1887, Heinrich Hertz investigated the phenomenon of light striking a metal surface, causing the ejection of electrons from the metal. The classical theory of electromagnetism predicted that the energy of the electrons ejected should have been proportional to the intensity of the light. that the of the electrons was f of the intensity of the light. Furthermore, for low enough frequencies, no electrons were ejected, no matter how great the intensity of the light became. The following problem outlines the methods used to investigate this new finding in physics: the photoelectric effect. For the incident light to cause the ejection of an electron, the light must impart a certain amount of energy to the electron to overcome the forces that constrain it within the metal. The minimum amount of energy required to overcome these forces is called the work function . Different metals will have different values for ø. For an electron to reach the detector, the light must impart enough energy for the electron to overcome both the work function and the stopping potential. Part B Suppose that the light carries energy Elight. What is the maximum stopping potential V₁ that can be applied while still allowing electrons to reach the detector? Express your answer in terms e, Elight, and . ► View Available Hint(s) Vo = ΠΙ ΑΣΦ ?
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