Kinetic energy of a photon

    • Measuring Planck’s Constant Using the Photoelectric Effect

      Photon energies can be calculated by where . c = 3.00 x 108 m/s is the speed of light in a vacuum and is the wavelength of the photon in m. Frequency can be found for a photon using . The kinetic energy of an electron can be found by applying an opposing or retarding voltage to the electron to see how much is needed to stop it moving.

    • [DOC File]Physics 201: Experiment #2 The Photo-electric Effect

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      Determine the frequency of this light and the energy per photon. It is sometimes convenient to speak about the wavenumber defined as 1/ and traditionally quoted in unit of cm-1 (sometimes this unit is just called “wavenumbers”). If visible light runs from a wavelength range of 4000 to 6500 Å work out the range in terms of wavenumber ...

    • [DOC File]Photoelectric Effect Practice Problems

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      6. What is the energy of one quantum of 5.0 x 1014 Hz light? 7. A photon has 3.3 x 10-19 J of energy. What is the wavelength of this photon? What part of electromagnetic spectrum does it come from? 8. Which as more energy, a photon of violet light or a photon of red light from the extreme ends of the visible spectrum?

    • [DOC File]THE PHOTOELECTRIC EFFECT

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      If the photon energy is E = h( (where ( = c/( is the frequency of the light), then the maximum kinetic energy of the emitted electrons is: Kmax = h( ( ( (1) To determine the kinetic energy of the electrons, we measure the voltage necessary to stop the most energetic electrons. This voltage is called the stopping potential Vs.

    • [DOC File]Practice Quiz 10 - California State University, Northridge

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      9) A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.611 nm, what is the energy of the scattered photon? A) 1.05 × 10-16 J . B) 2.10 × 10-16 J . C) 5.71 × 10-16 J . D) 3.23 × 10-16 J . Answer: D

    • PHY 102

      3. Ultraviolet light is responsible for sun tanning. Find the wavelength of an ultraviolet photon whose energy is 6.4 x 10-19 J. E = hf. c = f E = hc/ = hc/E = 6.63 x 10-34 x 3 x 108/6.4 x 10-19 = 311 x 10-9 m. 4. A light source emits a beam of photons. Each of photon has a momentum of 2.3 x 10-29 kg m/s. (a) What is the frequency of the photon?

    • Chapter 7: Quantum Theory and the Electronic Structure of ...

      19. A photon is roughly 1800 times more massive than an electron. If a proton and an electron have the same kinetic energy, A) the wavelength of the photon will be about 1800 times longer than the wavelength of the electron. B) the wavelength of the photon will be about times longer than the wavelength of the electron.

    • [DOCX File]Baltimore Polytechnic Institute

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      The energy of each photon is directly proportional to its frequency and inversely proportional to its wavelength and can be calculated using the formula: E. photon = hf = hc/ . The constant of proportionality, h, is called “Planck’s Constant” and is equal to 6.63x10-34 J s.

    • [DOC File]What is a photon, really

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      Mead writes, “In a collective system, the sum of the potential and kinetic energy terms, when integrated over all space, represents the total electrodynamic energy. As Maxwell indicated, if the accounting is done this way, there is no additional ‘energy of the field’ for which to account.” ... Each photon, if it strikes a lower-level ...

    • [DOC File]Introduction to Nuclear Physics and Gamma-Ray Spectroscopy ...

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      When a -ray photon enters the NaI(Tl) crystal (or any matter) it can interact in one of three ways: photoelectric capture, Compton scattering or pair production. In the photoelectric effect all of the energy is absorbed by a bound electron and is converted into the kinetic energy of this electron (minus a small binding energy and recoil loss).

    • [DOC File]Lab: Photoelectric Effect

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      The energy of the electron was divided up into two accounts: the energy needed to escape the metal’s surface, and the kinetic energy due to its movement after it escaped. Mathematically, this can be expressed as: Ephoton = Ekinetic + Eescape. The kinetic energy can be measured indirectly by using what is known as the stopping voltage.

    • Physics 30 - Home | Monsignor McCoy High School

      17. What is the energy difference between the two energy levels in a sodium atom that give rise to the emission of a 589 nm photon? (2.1 eV) 18. An electron whose kinetic energy is 3.0 eV collides with a free mercury atom. What will be the kinetic energy of the electron after the collision? (3.0 eV) 19.

    • [DOC File]The following is a simple strategic methodology to tackle ...

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      B. demonstrate that phenomena of electron kinetic energy being transformed into photon energy. C. are an extremely penetrating form of radiation. D. all of the above are true. 7. The wave theory of light and the quantum theory of light . A. are in direct contradiction to one another.

    • [DOC File]Homework of Phys 621-Quantum mechanics I (Fall 2007)

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      Show that the maximum kinetic energy transferred to a proton when hit by a photon of energy is , where mp is the mass of the proton. In a double-slit experiment with a source of monoenergetic electrons, detectors are place along a vertical screen parallel to the y-axis to monitor the diffraction pattern of the electrons emitted from the two slits.

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