Photoelectric Effect PPT
Title: Photoelectric Effect Author: Yelena Borovitskaya Last modified by: Yelena Borovitskaya Created Date: 4/13/2004 7:39:02 PM Document presentation format
The Photoelectric Effect By: Megan, Mark & Andrew The Photoelectric Effect The Photoelectric Effect was in fact discovered by accident while Heinrich Hertz (1857-1894) was trying to prove Maxwell’s theories of Electromagnetism.
Title: The Photoelectric Effect Author: Robert Casao Last modified by: Robert Casao Created Date: 3/17/2006 5:47:39 PM Document presentation format
Title: PowerPoint Presentation - Photoelectric effect Author: University Library Last modified by: SRJC Created Date: 4/27/2006 3:35:16 AM Document presentation format
The photoelectric effect To be a wave or a particle? That is the question. Quick overview: X-ray machine hits target with electrons and EM radiation flies out In the photoelectric effect, you hit target with EM radiation and electrons fly out!
Uses and effects of the Photoelectric Effect Space Shuttles Because of the photoelectric effect the sun's rays can cause the panels of a spaceship to collect a static charge.
Same basic principle as the photoelectric effect: Incoming photons excite electrons into a conductive energy level. Voltage results without the ejection of electrons.
Photoelectric Effect Absorption Charges can absorb electromagnetic waves. Can cause charge to accelerate Ejected Electrons Electromagnetic energy could eject electrons from the surface.
Objectives. WWBAT… Describe the photoelectric effect. Describe the effect of changing light intensity or wavelength on the number and energy of electrons emitted in the photoelectric effect
Photoelectric Effect Photoelectric Effect What is Light? ELECTROMAGNETIC THEORY (1862) Waves of electric and magnetic energy Evidence: interference, polarization, diffraction Radiation causes electrons to be ejected from metal plate At stopping voltage V0, no electrons ...
The Photoelectric Effect Einstein’s Triumph Presentation Text ©2001 Philip M. Dauber Graphics courtesy of Physics 2000, University of Colorado
The Photoelectric Effect The photoelectric effect is the emission of electrons from a metal or surface by light photons. Photon Energy E = h f E Energy Joule (J) h Planck’s constant (J.s) f frequency Hertz (Hz) Energy conservation h f = F + KEmax KEmax = h f – F KE Kinetic Energy Joule (J) F ...
Photoelectric Effect T.T. Photoelectric Effect - - - - - - - - - - - - - - - - - - - Negatively Charged Electroscope Photoelectric Effect UV When UV shines on the cap… …the ...
PHOTOELECTRIC EFFECT * * * Photoelectric Effect What is it : When metal surfaces are exposed to electromagnetic radiation with sufficient energy they absorb the photons of energy and emit electrons.
The Photoelectric Effect Photoelectric effect: experiment showing light is also a particle. Energy comes in particle-like chunks- basics of quantum physics.
Bibliography A photoelectric effect is any effect in which light energy is converted to electricity. If wires are attached to a photoemittive material, the electrons can flow along the wires, forming an electric current.
Photoelectric Effect The following graphs illustrate what the wave theory predicts will happen: Photoelectric Effect We now show in green what actually happens: Photoelectric Effect In addition, we see a connection between the stopping voltage and frequency above f-co: ...
PHOTOELECTRIC EFFECT The particle nature of light Recall… Light (energy) has a wave-nature (exhibits diffraction and interference effects) Matter has a particle nature (has mass and occupies space) Matter has a wave nature (Electron beam undergoes diffraction / interference) Light (energy) has ...
Techniques and Tools for Teaching the Photoelectric Effect Sam McKagan, Ward Handley, Kathy Perkins, Carl Wieman January 9, 2007 AAPT Winter Meeting
Title: Blackbody Radiation Photoelectric Effect Wave-Particle Duality Author: cherie Last modified by: Cherie Bibo Lehman Created Date: 4/9/2010 3:27:40 AM
Planck’s Constant and the Photoelectric Effect Lulu Liu Partner: Pablo Solis Junior Lab 8.13 Preparatory Lab September 25th, 2007 What is the Photoelectric Effect?
The Photoelectric E ffect By Eleanor Girdziusz The Photoelectric Effect “The phenomenon that when light shines on a metal surface, electrons are emitted” Wave Theory Supported by such observations as: Refraction of light Reflection of light Interference patterns Diffraction of light Wave ...
Photoelectric Effect The probability of a photoelectric interaction is a function of the photon energy and the atomic number of the target atom. A photoelectric interaction can not occur unless the incident x-ray has energy equal to or greater than the electron binding energy.
Chapter 29 - Particles and Waves Who won the Nobel prize for his explanation of the photoelectric effect? Planck Bohr De Broglie Einstein The minimum amount of energy to free an electron from a piece of metal is called: The electron volt The work function The threshold energy The quantum energy ...
Lecture #15 Photon Theory of Light and the Photoelectric Effect March, 21st Announcements “You will receive Exam #2 results during this week’s workshop.
Physics 1161: Lecture 22 Blackbody Radiation Photoelectric Effect Wave-Particle Duality sections 30-1 – 30-4 * How Do They “Know” photons hit the film at places they would not hit if both slits were open!
Title: The Compton Effect Author: shannon Last modified by: Berkner Created Date: 5/11/2009 4:27:48 AM Document presentation format: On-screen Show (4:3)
PHOTOELECTRIC EFFECT AND DUAL NATURE OF MATTER AND RADIATIONS Photons Photoelectric Effect Experimental Set-up to study Photoelectric Effect
The Photoelectric Effect Explain the importance of the photoelectric effect in confirming the principle of the quantum theory. Explain the meaning of the term stopping potential.
Photoelectric Effect e e Photoelectric Effect Photoelectric equation Energy of incident photon hf Work function KE of freed electron Photoelectric equation Graphical representation Photoelectric Effect Photoelectric Effect Photoelectric Effect Photoelectric Effect Photoelectric Effect ...
Photoelectric effect? Spectral lines from gas discharge tubes? Between 1900 and 1930 quantum mechanics was developed to help explain the behavior of atoms, molecules, and nuclei. It modifies our ideas concerning the physical world.
Recall: The Photoelectric Effect "When light strikes a material, electrons are emitted. The radiant energy supplies the work necessary to free the electrons from the surface." Photoelectric Fact #1 The LIGHT ENERGY (E) is in the form of quanta called PHOTONS.
Quantization of Charge, Light, and Energy 1. Quantization of Electric Charge; 2. Blackbody Radiation; 3. The Photoelectric Effect 4. X-rays and the Compton Effect.
Dual Nature of Light. Light Quanta Photoelectric Effect Photoelectric effect Ejection of electrons from metal surfaces by photon impact Minimum photon energy (frequency) needed to overcome electron binding PE Additional photon energy goes into KE of ejected electron Intensity of light related to ...
Physics 6C The Photoelectric Effect Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB incoming light e- e- e- e- e- e- e- e- metal plate Photoelectric Effect Here is the basic setup for the experiment.
... 1/2 – moc2 Chapter 27 Quantum Physics Photoelectric Effect Compton Effect Photon Theory of Light Wave Nature of Matter Wave-Particle Duality Wave Function Uncertainty Principle Ideas of quantum theory were developed when classical physics could not explain a handful of physical ...
Photoelectric Effect (How Einstein really became famous!) Photoelectric Effect Photoelectric Effect As blue light strikes the metal foil, the foil emits electrons.
Quantum Theory of the Atom Chapter 7 Dr. Victor Vilchiz Photoelectric Effect Photoelectric Effect Quantum Effects and Photons Photoelectric Effect Photoelectric Effect Photoelectric Effect Experiment Photoelectric Effect If Classical Theory was correct and apply to this experiment then when the ...
L 35 Modern Physics  Introduction- quantum physics Particles of light PHOTONS The photoelectric effect Photocells & intrusion detection devices
Photoelectric effect, photons Physics 123 Concepts Photoelectric effect Work function and stopping potential ElectronVolt (eV) Photons Blackbody radiation Photoelectric effect Light shines on metal surface P Electrons are emitted from P Current flows between P and C Measure kinetic energy of ...
photoelectric effect max planck the photoelectric effect this is the emission of electrons from matter when matter is illuminated by certain types of electromagnetic radiation.
Interaction of Gamma-Rays - General Considerations uncharged transfer of energy creation of fast electrons Interaction of Gamma-Rays - Types photoelectric Compton pair production photodisintegration Photoelectric Effect Einstein, 1905, as part of his Nobel prize winning paper on the photon ...
Photoelectric Effect Photoelectric Effect - when light shines on a metal surface, electrons can be emitted from the surface. Only light above a certain frequency will cause this affect to happen; Wave theory does not accurately explain photoelectric effect.
Photoelectric Effect (I) Photoelectric Effect (II) PhotoElectric Effect (III) Photo-Electric Effect (IV) Photons The Electromagnetic Spectrum Momentum Do photons carry momentum ?
Planck's quantum theory is compatible with the experimental data related to which of the following? blackbody radiation the photoelectric effect.
The Wave – Particle Duality OR Light Waves And then there was a problem… Photoelectric Effect (I) Photoelectric Effect (II) PhotoElectric Effect (III) Photo-Electric Effect (IV) Photons The Electromagnetic Spectrum Momentum Do photons carry momentum ?
The release of electrons only occurs if a single photon hitting the metal target transfers its energy to one electron, giving that oneelectron the energy to move.
CHEMISTRY Photoelectric Effect Photoelectric Effect (Quantum Theory of Light) Einstein created the quantum theory of light, which state that electromagnetic radiation traveled as tiny packets of energy called quanta, or photons, that behaved like particles.
Most of these are of relatively low energy and are absorbed by the material. (b) Photoelectric effect The photon energy is much greater than , and only part of this is given up during the interaction with an outer valence electron ...
The photoelectric effect However, around the turn of the 20th century, an effect that became known as the photoelectric effect defied explanation using the wave model. The photo-electric effect.