I. Light and Quantized Energy (Cont.)

Slides:

Advertisements

Similar presentations

Physics and the Quantum Mechanical Model Section 13.3

Advertisements

The Photoelectric Effect Key Points. What is it ? Electrons are emitted from zinc when ultraviolet radiation shines on it. Other metals emit electrons.

Chapter 29 - Particles and Waves. 1.Who won the Nobel prize for his explanation of the photoelectric effect? A.Planck B.Bohr C.De Broglie D.Einstein 2.The.

Waves. Characteristics of Waves Frequency Amplitude.

The Development of a New Atomic Model.

The Rutherford model of the atom was an improvement over previous models, but it was incomplete. J. J. Thomson’s “plum pudding” model, in which electrons.

Creating a foldable for the electrons in atoms notes

Electromagnetic Radiation

Entry Task: October 12 th Friday Question: What makes up the colors in a rainbow? What other types of waves exist? You have 5 minutes!

Chemistry Chapter 5 Ch5 Notes #1.

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

Light and Electrons October 27, 2014.

E = hf E – energy of a quantum (Joules) h – Plank’s constant (6.626 x J  s) f – frequency of absorbed or emitted EMR.

Particle Properties of Light. Objectives To discuss the particle nature of light.

Nuclear Atom and Unanswered Questions

Particle Nature of Light

Many scientists found Rutherford’s Model to be incomplete  He did not explain how the electrons are arranged  He did not explain how the electrons were.

Chapter 4 Arrangement of Electrons in Atoms

Energy. Radiant Energy Radiant: think light…. How does light carry energy through space???

Light and Quantized Energy Chapter 5 Section 1. Wave Nature of Light Electromagnetic radiation is a form of energy that exhibits wavelike behavior as.

Electromagnetic Spectrum

Arrangement of Electrons in Atoms The Development of a New Atomic Model.

Electrons in Atoms Chapter 5.

Wave-Particle Duality: The Beginnings of Quantum Mechanics.

Wave-Particle Duality: The Beginnings of Quantum Mechanics.

Light and the Atom. Light Much of what we know about the atom has been learned through experiments with light; thus, you need to know some fundamental.

Chapter 5: Electrons in Atoms

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

(The Dual Nature of Electromagnetic Radiation; Plank’s Constant)

Development of a New Atomic Model Properties of Light.

Electrons in Atoms Light is a kind of electromagnetic radiation. All forms of electromagnetic radiation move at 3.00 x 10 8 m/s. The origin is the baseline.

Vocabulary Review New radiation electromagnetic radiation wavelength

Light: Wave or Particle Chapter 4, Section 1 notes.

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.

1. Page 124: 5, Q + 5 A from today’s class.

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

Atomic Structure.

Quantized Energy and Photons

Arrangement of electrons in atoms

Lecture 20 Light and Quantized Energy Ozgur Unal

Light and Quantized Energy

Section 5.1 Light and Quantized Energy

4.5 NOTES LIGHT and ENERGY.

Particle Nature of Light

Electromagnetic Radiation

Quantum Energy and Photoelectric Effect

Chapter 5 Electrons in Atoms

Chemistry 1 Chapter 5 Part I Light and Quantized Energy

Chemistry 1 Notes # 8 Light and Quantized Energy

PHOTOELECTRIC EFFECT hhhhh 12/4/2018.

Section 5.1 Light and Quantized Energy

Section 1: Light and Quantized Energy

UNIT 3 ELECTRON CONFIGURATION AND MODERN ATOMIC THEORY

Light and Quantized Energy

Chemistry 1 Chapter 5 Part I Light and Quantized Energy

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.

Arrangement of Electrons in Atoms

Section 5.1 Light and Quantized Energy

Physics and the Quantum Model

5.1 – ELECTRONS IN ATOMS.

Electrons in Atoms Ch. 5 Notes.

Electron Configurations

Arrangement of Electrons in Atoms

Chapter 4 Arrangement of Electrons in Atoms

Key Areas covered Photoelectric effect as evidence for the particulate nature of light Photons of sufficient energy can eject electrons from the surface.

4.6 NOTES Atomic Emission Spectra

Section 1: Light and Quantized Energy

The Development of a New Atomic Model

Quantized Energy and Photons

Section 1: Light and Quantized Energy

Presentation transcript:

I. Light and Quantized Energy (Cont.)

C. Wave Model Shortcomings Wave Model failed to explain light’s interaction with matter Why did heated objects emit only certain frequencies of light? Why did some metals emit electrons when colored light of a specific frequency shines on them?

C. Quantized Energy 1900 – Max Planck comes to conclusion: matter can gain or lose energy ONLY in small, specific amounts called quanta. Quantum – the minimum amount of energy that can be gained or lost by an atom Prior thought = E could be absorbed/emitted in varying quantities

C. Quantized Energy Cont. Planck  energy of a quantum is related to frequency of the emitted radiation Equantum = hν E = Energy (Joules; J) h = 6.626 x 10-34 J • s (Planck’s Constant) ν = frequency (Hz ; 1/s ; s-1)

Despite Planck’s proposal, the wave model was still very popular…

D. Photoelectric Effect Wave model could not explain the Photoelectric Effect Photoelectric Effect – electrons (photoelectrons) are emitted from a metal’s surface when light of a certain frequency shines on the surface

D. Photoelectric Effect Cont. Photoelectric Effect Uses Automatic Doors Intrusion Alarms Solar Panels Solar Powered Calculators

D. Photoelectric Effect Cont. Where the wave model fails: Light with frequency less than 1.14 x 1015 Hz does not eject photoelectrons from silver (no matter how intense or how long it shines) Dim light having a frequency equal to or greater than 1.14 x 1015 Hz will

E. Particle Nature of Light To explain photoelectric effect, Albert Einstein proposed that light behaves like a particle Think of as a stream of tiny particles (bundles of energy) called photons Photons – particle of electromagnetic radiation with no mass that carries a quantum of energy