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[DOCX File]16. Planck's Constant
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Planck's Constant. Structured. Driving Question | Objective. What is the value of Planck's constant and how can it be determined experimentally? Given the quantization of light energy and the relationship between photon energy and frequency, perform an experiment using the light emitted from monochromatic LEDs to determine the value of Planck's ...
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[DOC File]THE PHOTOELECTRIC EFFECT
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OBJECTIVE: To determine Planck’s constant by observing the photoelectric effect. REFERENCE: Krane, Section 3.2. THEORY: When light (or other electromagnetic radiation) is incident on a metal surface, electrons can be released from the metal. This is the photoelectric effect.
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[DOC File]DETERMINATION OF PLANCK’S CONSTANT USING LEDS
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DETERMINATION OF PLANCK’S CONSTANT USING LEDS (Rev 3/22/10) SETUP AND DATA TAKING. Connect the power supply and meters to the LED as shown in the diagram. Use a power supply with coarse and fine knobs. Use the Protek meter to measure current. Set power supply to 0 volts before turning on. Start with the blue LED (according to wavelength) on ...
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Measuring Planck’s Constant Using the Photoelectric Effect
h = 6.63 x 10-34 Js (Planck’s constant) f = photon frequency in Hz. W= work function of the metal in J. The work function (W) of a metal is the minimum energy needed for an electron to be freed from the surface of the metal. The actual energy needed to free any given electron may be more than the work function; hence, the range of possible ...
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[DOC File]Measuring Planck's Constant:
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To demonstrate the quantization of light and to measure Planck's constant (h). Background: The energy lost by a single electron that passes through a light-emitting diode (LED) is converted into the energy of one photon. e ΔV = h f. e = elementary charge = 1.6 x 10-19 C.
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[DOC File]A Determination of Planck’s
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Constant: The Diode Method It was the purpose of this lab to determine Planck’s Constant, h, by utilizing very simple equipment. Diodes which emit specific wavelengths were employed in a manner that allows one to determine h from voltage and current measurements; basically due to what could be considered the inverse of the photoelectric effect.
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[DOC File]austincc.edu
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In modern notation, Planck’s relationship is given by. where. f is the frequency of the oscillation. n is some integer. h is a constant known as Planck’s constant. The h has a value. Albert Einstein adapted Planck’s idea in 1905 to explain a phenomenon known as the photoelectric effect.
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[DOC File]QUANTUM DOTS - Auburn
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Use your wavelengths and dot sizes provided to calculate value of Planck’s constant. Plot a graph of your wavelength versus quantum dot size (R). As R increase what is the limiting value (formula & specific number) of the wavelength? Use the data provided from Physics Teacher to determine the material in …
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[DOC File]Determining Planck’s Constant from the Photoelectric Effect
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Planck’s constant, the ratio between the energy of the emitted electrons and the frequency of the incident photons, is what will be measured in this experiment. These extraordinary results were recognized by Nobel Prizes in Physics for Planck in 1918, Einstein in 1921, and Millikan in 1923.
what does planck's constant measure

What is planck s constant