Light Wave or Particle?.

Slides:



Advertisements
Similar presentations
Lecture Outline Chapter 30 Physics, 4th Edition James S. Walker
Advertisements

Both We call this the “Dual Nature of Light”
Universe Eighth Edition Universe Roger A. Freedman William J. Kaufmann III CHAPTER 5 The Nature of Light CHAPTER 5 The Nature of Light.
The Photoelectric Effect Waves as particles? What, are you crazy??
Knight - Chapter 28 (Grasshopper Book) Quantum Physics.
Cutnell/Johnson Physics 7th edition
© 2007 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.
Photoelectric Effect (Quantum Theory of Light) Einstein (1905) created the quantum theory of light, which states that electromagnetic radiation traveled.
Light-particle or wave Particles- bounce, move by collisions, cause other things to move, have mass, momentum, travel in straight lines properties depend.
Radiation:.
Blackbody Radiation Photoelectric Effect Wave-Particle Duality sections 30-1 – 30-4 Physics 1161: Lecture 28.
Review. The Wave Nature of Light Important: When a light wave travels from one medium to another, its frequency does not change, but its wavelength does.
The dual nature of light l wave theory of light explains most phenomena involving light: propagation in straight line reflection refraction superposition,
Electrons And Light. Electromagnetic Radiation Energy that travels as a wave through space Wavelength –λ – distance between corresponding points on adjacent.
Arrangement of Electrons in Atoms Part One Learning Objectives Read Pages Asgn #16: 103/1-6 1.
Quantum Mechanics 101 Waves? or Particles? Interference of Waves and the Double Slit Experiment  Waves spreading out from two points, such as waves.
Classical vs Quantum Mechanics Rutherford’s model of the atom: electrons orbiting around a dense, massive positive nucleus Expected to be able to use classical.
Lecture 15: Electromagnetic Radiation
Lecture 16: Electromanetic Radiation Reading: Zumdahl 12.1, 12.2 Outline –The nature of electromagnetic radiation. –Light as energy. –The workfunction.
Index Unit 03 Electron Configuration Module 02: Light as a Particle Based on the PowerPoints By Mr. Kevin Boudreaux, Angelo State Univerisity U03Mod01.
Physics 361 Principles of Modern Physics Lecture 5.
PHYSICAL CHEMISTRY - ADVANCED MATERIALS Particles and Waves Standing Waves Wave Function Differential Wave Equation Something more about…. X=0 X=L Standing.
E-M Spectrum and Waves Prentice Hall Chapter 18.
2 classes of waves compressiontransverse Wave Behavior  All waves will Reflect Refract Diffract Interfere.
Modern Physics Wave Particle Duality of Energy and Matter Is light a particle or a wave? We have see that light acts like a wave from polarization, diffraction,
Blackbody Radiation Photoelectric Effect Wave-Particle Duality sections 30-1 – 30-4 Physics 1161: Lecture 22.
Quantum Mechanics. Planck’s Law A blackbody is a hypothetical body which absorbs radiation perfectly for every wave length. The radiation law of Rayleigh-Jeans.
As an object gets hot, it gives Off energy in the form of Electromagnetic radiation.
Wave Interaction Chapter Reflection Occurs when a wave “bounces” off a barrier Examples –Echoes –Light reflection (Moon) Return to Wave Interactions.
Leading up to the Quantum Theory.  exhibits wavelike behavior  moves at a speed 3.8 × 10 8 m/s in a vacuum  there are measureable properties of light.
Thompson’s experiment (discovery of electron) + - V + - Physics at the end of XIX Century and Major Discoveries of XX Century.
Chapter 22 Objectives Describe reflection, refraction, diffraction, and interference. Compare destructive interference with constructive interference.
Bellwork What is the majority of the volume of an atom?
I Love Lucy Airs for First Time (1951) READING: reread chapter 7 READING: reread chapter 7 HOMEWORK – DUE TUESDAY 10/20/15 HOMEWORK – DUE TUESDAY 10/20/15.
Chapter 4: Electron Configurations Development of New Atomic Model.
ELECTROMAGNETIC RADIATION subatomic particles (electron, photon, etc) have both PARTICLE and WAVE properties Light is electromagnetic radiation - crossed.
Solids and Light – Introduction to Light
Chapter 1 Section 3 t-catch-the-physics-of-waves.html.
6.1 The Dual Nature of Light Chemistry Ms. Pollock
Plan for Today (AP Physics 2) Ch 24, 27, and 28 Review Day More Review Materials.
The Nature of Light The Electromagnetic Spectrum.
Physics 213 General Physics Lecture Exam 3 Results Average = 141 points.
Reflection happens when a wave bounces back after hitting a barrier. All waves-including water, sound, and light waves-can be reflected.
Chemistry I Chapter 4 Arrangement of Electrons. Electromagnetic Radiation Energy that exhibits wavelike behavior and travels through space Moves at the.
 Read through your lab packet.  Take only the following with you: ◦ Lab packet ◦ Writing utensil(s) ◦ Blank sheet of paper  You will have about 10.
Introduction to Physics and Astronomy (1) 2-1. Light and Black Body Radiation.
The Wacky World of Quantum Physics
LIGHT.
The Electromagnetic Spectrum and Light
Waves, Sound, & Light Energy
Wave Particle Duality.
THEORIES OF LIGHT Is light a wave or a stream of particles?
Can a soccer ball Diffract?
Light Big Idea: Electromagnetic Radiation, which includes light, is a form of radiant energy possessing properties of both waves and zero-mass particles.
The Electromagnetic Spectrum and the Model of the Atom Part I
1 WAVES.
Physics 102: Lecture 22 Quantum Mechanics: Blackbody Radiation, Photoelectric Effect, Wave-Particle Duality 1.
Wave Interaction Chapter 1.3.
Wave Interactions.
How do multiple waves interact with one another?
A history of atomic structure
WAVE PHENOMENA.
How do waves travel.
Light and Energy Electromagnetic Radiation is a form of energy that is created through the interaction of electrical and magnetic fields. It displays wave-like.
Chapter 17-3 Notes Name: The ripples visible on the bottom of the pool are caused by light shining through surface waves.
Physics 102: Lecture 22 Quantum Mechanics: Blackbody Radiation, Photoelectric Effect, Wave-Particle Duality 1.
Light Basics.
Properties of Waves Part 2.
Unit 4: Properties of Matter and the Analysis of Glass
Waves 7th 2.3 Wave Behavior.
Presentation transcript:

Light Wave or Particle?

Evidence Wave Properties Particle Properties

Interference of Light When two light waves hit they _______________________________ each other. While they occupy the same space the waves _______ amplitudes and frequencies to produce a different wave. This is called _______________________. If two _________ hit they bounce off each other. They don’t interfere like waves.

Refraction & Dispersion of Light When light enters glass it _________. This is called ____________ How much light refracts depends on the type of _____ and the ____ of light. A particle could refract, wave theory works better. When _________ light enters glass the different frequencies bend differently. This causes the light to split into the ____________. This is called ______________. Particles wouldn’t display dispersion.

The Doppler Effect for Light When a light source is moving the frequency of light it emits changes due to this _____________. A particle doesn’t do this, only a _____________.

Diffraction of Light You get a _________________, called a _______________________ pattern. Basically the light __________ as it _________ the slit causing an alternating series of constructive and destructive interference. A particle wouldn’t do this. If I fire this laser through a small slit, what will I see on the wall when it hits?

The Photoelectric Effect When light hits certain metals it causes the metal to eject ______________. Treating light as a wave tells us that the __________ the light, the more electrons get ejected or the electrons get ejected at a ________________. This would be true if it wasn’t__________!!! It turns out the ______________ of the light is what determines whether or not electrons are ____________ from the metal. This suggests that light travels in _________ or packets called _______ which behave like particles.

The Ultraviolet Catastrophe A blackbody radiator absorbs all electromagnetic radiation that hits it and emits its own electromagnetic radiation based on its ___________. Wave theories predict that the wavelengths of electromagnetic waves a blackbody will emit should follow the relationship shown by the ___________________ in the graph. It turns out that experiments show that the wavelength of electromagnetic waves emitted by a blackbody actually follow the ______________ shown in the graph called blackbody curves. Which curve is determined by the temperature of the blackbody.

The Ultraviolet Catastrophe This also suggests that light travels in _______ or packets called ______ which behave like ________.

The dual nature of light