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The attached image shows current-versus-voltage curves for the photoelectric effect using light with a mix of three frequencies f₁, f2, and f3. Explain the graph and the shape of the curves in a few sentences. Include the meaning of the voltage-intercepts (-V) and which frequency is highest and lowest. Responses Photoelectric current J₁ J2 Js -Vol-Vo2 - Vos Photon intensity d = consta Applied voltage V

The attached image shows current-versus-voltage curves for the photoelectric effect using light with a mix of three frequencies f₁, f2, and f3. Explain the graph and the shape of the curves in a few sentences. Include the meaning of the voltage-intercepts (-V) and which frequency is highest and lowest. Responses Photoelectric current J₁ J2 Js -Vol-Vo2 - Vos Photon intensity d = consta Applied voltage V

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**Explanation of Photoelectric Effect Curves** The image displays current-versus-voltage curves demonstrating the photoelectric effect using light with three different frequencies: \( f_1 \), \( f_2 \), and \( f_3 \). **Graph Description:** - The horizontal axis represents the applied voltage (\( V \)), while the vertical axis represents the photoelectric current (\( I \)). - Each curve corresponds to a different frequency (\( f_1 \), \( f_2 \), \( f_3 \)), with \( f_1 \) having the highest frequency and \( f_3 \) the lowest. - The curves demonstrate that as the frequency of the light increases, the voltage at which the current becomes zero (stopping voltage) also increases. **Voltage Intercepts:** - The points where the curves intersect the voltage axis (\( -V \)) are labeled as \( -V_{01} \), \( -V_{02} \), and \( -V_{03} \) for \( f_1 \), \( f_2 \), and \( f_3 \) respectively. - These intercepts indicate the stopping potentials for each frequency, with higher frequencies having larger stopping voltages. **Summary:** This graph illustrates that higher frequency light induces photoelectric currents at higher stopping potentials, in line with the principle that the kinetic energy of emitted electrons depends on the frequency of the incident light. The photon intensity (\( l \)) is held constant across different frequencies.
Transcribed Image Text:**Explanation of Photoelectric Effect Curves** The image displays current-versus-voltage curves demonstrating the photoelectric effect using light with three different frequencies: \( f_1 \), \( f_2 \), and \( f_3 \). **Graph Description:** - The horizontal axis represents the applied voltage (\( V \)), while the vertical axis represents the photoelectric current (\( I \)). - Each curve corresponds to a different frequency (\( f_1 \), \( f_2 \), \( f_3 \)), with \( f_1 \) having the highest frequency and \( f_3 \) the lowest. - The curves demonstrate that as the frequency of the light increases, the voltage at which the current becomes zero (stopping voltage) also increases. **Voltage Intercepts:** - The points where the curves intersect the voltage axis (\( -V \)) are labeled as \( -V_{01} \), \( -V_{02} \), and \( -V_{03} \) for \( f_1 \), \( f_2 \), and \( f_3 \) respectively. - These intercepts indicate the stopping potentials for each frequency, with higher frequencies having larger stopping voltages. **Summary:** This graph illustrates that higher frequency light induces photoelectric currents at higher stopping potentials, in line with the principle that the kinetic energy of emitted electrons depends on the frequency of the incident light. The photon intensity (\( l \)) is held constant across different frequencies.
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Photoelectric effect - 

It is the phenomenon of emission of electrons from the metal surface , when radiations of suitable frequency fall in them . The emitted electrons are called photo electrons and the current so produced is called secondary electrons .

 

 

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