About This Chapter
Light & Electromagnetic Waves - Chapter Summary
Top instructors have developed engaging online lessons you can access anytime to study light and electromagnetic waves. View the lessons using any computer or mobile device to enjoy an in-depth examination of the nature of light, Huygen's Principle, wave-particle duality and much more. Find out how much you understand about each lesson you study by taking its accompanying quiz. Use the practice exam to test your knowledge of the entire chapter. When finished, you should be ready to:
- Define and discuss the sources and properties of electromagnetic waves
- List the seven major regions of the electromagnetic spectrum
- Describe opaque and transparent materials in electromagnetic waves
- Discuss the basics of color, including white light, absorption and reflection
- Explain Malus's Law and the polarization of light
- Outline Brewster's Law and polarization by reflection
- Explain the interference pattern of single-slit, double-slit and multiple-slit diffraction
- Identify the concept of thin film interference
- Use equations to calculate the energy and momentum of a photon
1. Electromagnetic Waves: Definition, Sources & Properties
In this lesson, learn the basics of electromagnetic waves and how they make up the electromagnetic spectrum. We will explore the major trends and categories within the spectrum, as well as the various sources of electromagnetic waves.
2. The 7 Major Regions of the Electromagnetic Spectrum
This lesson will walk you through each of the major regions of the electromagnetic spectrum. Explore the unique characteristics of X-rays, microwaves, radio waves, UV rays, infrared, gamma rays, and of course, visible light.
3. The Nature of Light: Origin, Spectrum & Color Frequency
This lesson introduces the basics of visible light and color. Learn how the visible light spectrum is divided into the six color ranges. We'll also discuss why different people name colors in different ways.
4. Color: White Light, Reflection & Absorption
What gives color to objects? How do light waves interact with materials to produce red and green or white and black? In this lesson, learn how white light is composed of all colors and how absorption and reflection influence our color perception.
5. Transparent and Opaque Materials in Electromagnetic Waves
What makes an object transparent or opaque? How does light pass through some objects and not others? And what about the other types of electromagnetic waves? We'll investigate all these questions in this lesson about the transparency and opacity of materials.
6. Energy & Momentum of a Photon: Equation & Calculations
After watching this lesson, you will be able to explain what wave-particle duality is, provide the equations for the energy and momentum of a photon of light, and use those equations to solve problems. A short quiz will follow.
7. Polarization of Light & Malus's Law
After watching this video, you will be able to explain what polarization of light is, list a number of examples of how polarization of light is used, state Malus's Law, and use it to solve problems involving the intensity of light through a polarizer.
8. Polarization by Reflection & Brewster's Law
After watching this lesson, you will be able to explain what polarization by reflection is, give a few examples of polarization in everyday life, explain Brewster's Law descriptively and use the equation to solve problems. A short quiz will follow.
9. Diffraction & Huygen's Principle
After watching this video, you will be able to explain what diffraction is, provide some real-life examples of diffraction, state Huygen's Principle, and explain how Huygen's Principle applies to those real-life examples. A short quiz will follow.
10. Single-slit Diffraction: Interference Pattern & Equations
After watching this lesson, you will be able to explain what single-slit diffraction is, describe and picture the pattern that it creates on a distant screen and use the equation of single-slit diffraction to solve problems. A short quiz will follow.
11. Double-slit Diffraction: Interference Pattern & Equations
This lesson explores double-slit diffraction, including the significance of Young's double slit experiment and how the diffraction pattern forms. You will also learn to use equations to calculate the positions of minima and maxima in the pattern.
12. Multiple-slit Diffraction: Interference Pattern & Equations
After watching this lesson, you will be able to describe the diffraction pattern produced by multiple slits, as well as how it differs from single-slits and double-slits. You will also be able to list examples of diffraction gratings in real life and solve problems to figure out the position of the maxima and minima produced when light in shined through a diffraction grating. A short quiz will follow.
13. How Thin Film Interference Works
After watching this video, you will be able to explain how thin film interference works, give examples of thin film interference in everyday life and solve simple problems. A short quiz will follow.
14. Wave-Particle Duality: Concept, Explanation & Examples
Is light a particle with mass and substance? Or, is it just a wave traveling through space? Most scientists say light is both a particle and a wave! Find out how they came to this strange conclusion as we learn about the theory of wave-particle duality.
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Other chapters within the Physics 112: Physics II course
- Energy Transfers in Physics
- Heat Transfer & Interaction
- The Basics of Thermodynamics
- Ideal Gas Law & Kinetic Theory
- Mirrors & Lenses in Geometric Optics
- Basics of Electrostatics
- Magnetism Basics
- Series, Parallel & Combined Circuits
- Capacitors, Inductors & Alternating Current
- Modern Quantum Theory
- Basic Nuclear Physics
- General & Special Relativity
- Studying for Physics 112