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Photoelectric Effect, Light Intensity and Stopping Voltage - Physics Forums
Photoelectric Effect, Light Intensity and Stopping Voltage. In summary, during a physics investigation using a Photo-Electric Effect Instrument, the current produced was measured by altering the aperture size and intensity of the lamp. As expected, the current increased with higher intensity. However, when observing the voltage required to stop ...
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Photoelectric effect : retarding potential with back current
FAQ: Photoelectric effect : retarding potential with back current What is the photoelectric effect? The photoelectric effect is the phenomenon where electrons are emitted from a material when light of a certain frequency is shone on it. This was first observed by Heinrich Hertz in 1887 and was later explained by Albert Einstein in 1905.
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Photoelectric effect and zero time delay - Physics Forums
Zero time delay refers to the phenomenon in which there is no time lag between the absorption of a photon and the emission of an electron in the photoelectric effect. This was a key aspect of Einstein's theory of the photoelectric effect and helped to support the concept of photons as particles of light. 4.
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Photoelectric effect - Frequency vs. Current - Physics Forums
In the photoelectric effect, there is at most one photon is destroyed for every electron that is emitted by the surface. Some of the photons may be destroyed by processes other than the photoelectric effect. In an academic exercise or school test, I think that your hypothesis is probably fair. If the number of photons in incident radiation is ...
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Photoelectric Effect: Photoelectron Kinetic Energy vs. Frequency Graph
Photoelectric Effect: Photoelectron Kinetic Energy vs. Frequency Graph. In summary, the graph of kinetic energy against frequency of light falling on a cathode in a photoelectric cell will have the same slope for both a cathode with a greater force of attraction to its electrons and a cathode with lesser attraction.
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Photoelectric Effect (1) (1).docx - bartleby
Procedure Section 1 1. Start Virtual Physics and select Photoelectric Effect from the list of assignments. The lab will open in the Quantum laboratory. 2. The laboratory will be set up with a laser shining at an angle on a sheet of sodium metal. Atoms in the metal absorb the energy from the light and emit electrons.
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What are Einstein's 3 postulates for Photo electric effect?
Einstein's three postulates for the photoelectric effect are: The energy of a photon is proportional to its frequency. The photoelectric effect only occurs if the frequency of the incident light is above a certain threshold. The number of electrons emitted is proportional to the intensity of the incident light, but not its frequency.
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“Violating” Einstein’s Photoelectric Effect Model - Physics Forums
A. The Schottky effect type experiment. This type of experiment was done[1] even way back in the 20th century, even by giants in physics such Ernest Lawrence[2]. This is where the same photoelectric effect experiment was done but in a rather high external accelerating electric field. This field is applied usually perpendicular to the metal’s ...
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Why is there now evidence of a lag time in the photoelectric effect?
The photoelectric effect is important because it helps us understand the particle-like nature of light. It shows that light is made up of individual packets of energy called photons, and that these photons can transfer their energy to electrons in a material, causing them to be ejected. This phenomenon has significant implications in fields such as quantum mechanics and electronics.
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What is the threshold frequency for this material? - Physics Forums
May 13, 2006. Frequency Light Threshold. In summary, the question is asking for the threshold frequency of a material in a photoelectric effect, where incident photons with energy of 5.00 eV produce electrons with a maximum kinetic energy of 3.00 eV. The equation to find the threshold frequency is f (sub t) = (hf - KE)/h, where KE is the ...
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