Photoelectric effect 2015/5/13 Kyujin Shin Seongwook Park.

Slides:

Advertisements

Similar presentations

Photons Physics 100 Chapt 21. Vacuum tube Photoelectric effect cathode anode.

Advertisements

A potential difference V is maintained between the metal target and the collector cup Electrons ejected from C travel to A and G detects the flow Apply.

Wave/Particle Duality. Question: What happens if we repeat Young’s double slit experiment with a beam of electrons (particles) instead of light? Answer:

The Photoelectric Effect Waves as particles? What, are you crazy??

Page 1 Wave / Particle Duality PART I Electrons as discrete Particles. –Measurement of e (oil-drop expt.) and e/m (e-beam expt.). Photons as discrete Particles.

The Shell Model And Photoelectron Spectroscopy and the Structure of Atoms Ch 7 part 1.5.

APHY201 4/29/ The Electron   Cathode rays are light waves or particles?

Physics 2 Chapter 27 Sections 1-3.

(OR…HOW EINSTEIN REALLY BECAME FAMOUS) The Photoelectric Effect.

Quantization of Light Chapter 4. Chapter 4 Homework 4.9, 4.15, 4.23, 4.31 Due Monday 2/24.

1 Chapter 38 Light Waves Behaving as Particles February 25, 27 Photoelectric effect 38.1 Light absorbed as photons: The photoelectric effect Photoelectric.

Experimental History Leading to Quantum Theory Particles versus Waves.

Modern Physics (PC300) Class #10: 1)Experimental basis for the Introduction of Quantum Theory a) Photoelectric Effect b) X-Ray Production c) Charge/mass.

Experimental evidence that light is a wave:. Shine light of particular wavelength/frequency/color on metal plate C Electron ejected from plate C (“photo-electron”)

1 2 Recap Photoeletricity experiment presents three puzzling features that are not explainable if light were wave: 1) K max of the photoelectrons is.

The Photoelectric Effect Textbook: 12.1 Homework: pg. 608 #2, 8,

Particle Nature of Light page 49 of Notebook VISIBLE LIGHT ELECTRONS.

AP Phys 12 – Class Starter Welcome Back! 1.Form a group of 2 or 3, no more! 2.Collect a whiteboard and handout from the front 3.Let’s review Nuclear Chemistry.

WHAT IS A QUANTUM THEORY ? Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the.

Physics of Radiography

Lesson 9. Objective Explain, qualitatively and quantitatively, how the Compton effect is an example of wave particle duality, applying the laws of mechanics.

Lecture 1. Birth of Quantum Mechanics. Historical Background of QM

Wave-Particle Duality

Lecture 1. Birth of Quantum Mechanics. Historical Background of QM. Experiments, Theories & Student Presentation Engel, Ch. 1 Ratner & Schatz, Ch. 1 Quantum.

Regents Review 1.A racecar initially traveling at 55 m/s applies the breaks and comes to a stop in 2.2 s. a. What is the car’s acceleration? b. How far.

Wave-Particle Duality: The Beginnings of Quantum Mechanics.

Wave-Particle Duality: The Beginnings of Quantum Mechanics.

Special Relativity…continued, Diffraction Grating Equation and Photo-electric effect Relativistic Doppler Shift Relativistic Momentum and Energy Diffraction.

The Interaction of Light and Matter

1 volt = 1 joule / 1 coulomb 1 joule = 1 volt 1 coulomb 1 joule 1 volt 1 coulomb = x 1 volt 1.6 x coulomb How much energy would it take to move.

Wave-Particle Duality: The Beginnings of Quantum Mechanics.

The photoelectric effect To be a wave or a particle? That is the question.

27-3 Photon Theory & Photoelectric Effect

Quantum Theory & the History of Light

PARTICLE NATURE OF LIGHT. A Black Object Appears black because it absorbs all frequencies of light A black block of iron does this.

Photoelectron Spectroscopy (PES) A technique used to measure the binding energy of electrons in an atom or molecule. – As in the photoelectric effect,

Origin of Quantum Theory

1 Quantum Mechanics Experiments 1. Photoelectric effect.

12.8 Light as Particles: The Photoelectric Effect Einstein expanded on Newton and Planck’s idea of light as particles Einstein expanded on Newton and Planck’s.

Photon-matter interactions Contents: Photoelectric effect Compton scattering Pair production.

Light is a Particle Physics 12 Adv. Blackbody Radiation A blackbody is a perfect emitter; that is it emits the complete EM spectrum Work done by Gustav.

4-2 Quantum Theory. Planck’s Theory Max Planck predicted accurately how the spectrum of radiation emitted by an object changes with temperature.

EMR 2 The Compton Effect. Review of Photoelectric Effect: Intensity Matters - the greater the intensity/brightness, the greater the photoelectric current.

Photoelectric Effect. Lenard 1902: Studied energy of the photoelectrons with intensity of light. He could increase the intensity thousand fold. 1.Noticed.

Lesson 9. Objective Explain, qualitatively and quantitatively, how the Compton effect is an example of wave particle duality, applying the laws of mechanics.

Light CHEM HONORS. The Nature of Light Light is electromagnetic radiation, a wave composed of oscillating, mutually perpendicular electric and magnetic.

The photoelectric effect Contents: Einstein’s proposed experiment Solving photoelectric problems Example 1 | Example 2Example 1Example 2 Whiteboard Photon.

2.4.2 interaction of x-rays with matter

1905: Einstein Introduced Photon to Explain the Photoelectric Effect.

Chapter 4 Study Guide How to write electron configurations

Speed of light (c) Celeritas = latin for swiftness

Quantized Energy and Photons

Linked Multiple Choice Questions – Photoelectric Effect

Photoelectric Effect.

PHOTOELECTRON SPECTROSCOPY

Photoelectric Effect (1)

I. Light and Quantized Energy (Cont.)

The Particle Nature of Light

Chapter 29: Particles and Waves

Photoelectric Effect Maximum kinetic energy of the electron:

Quantization of Light It seemed to be a wave....

Wave/Particle Duality

Quantum Mechanics and atomic structure

Photoelectron Spectroscopy

Interaction of Electromagnetic Radiation with Matter

The Photoelectric Effect

Light Waves Photons Wavelength Changes Energy per photon changes

4.6 NOTES Atomic Emission Spectra

“Newton, forgive me...”, Albert Einstein

Presentation transcript:

Photoelectric effect 2015/5/13 Kyujin Shin Seongwook Park

Contents (1) What is a photoelectric effect? (2) What was the dilemma in the photoelectric effect? (3) What is Einstein’s assumption? (4) How did it resolve the dilemma? (5) What is a “scattering”? (6) How did Compton prove Einstein’s theory? (7) Any application of the photoelectric effect in real life?

(1) What is a photoelectric effect?

(2) What was the dilemma in the photoelectric effect? Why increasing the intensity had no effect to the energy of ejected electron??

(3) What is Einstein’s assumption?

(4) How did it resolve the dilemma

(5) What is a “scattering”

(6) How did Compton prove Einstein’s theory?

(7) Application of the photoelectric effect in real life? - CCD Camera

- Photoelectric sensor (7) Application of the photoelectric effect in real life?

- Photoelectron spectroscopy (7) Application of the photoelectric effect in real life?

Acknowledgement Kyujin Shin : Part (4), (5), and (6) Seongwook Park : Part (1), (2), (3), and (7)

References (1) Thomas Engel, Quantum chemistry & Spectroscopy, second edition, page 5-6. (2) Wikipedia, en.wikipedia.org, Search word ‘Photoelectric effect’ and ‘Compton scattering’.

Thank you