32. Electromagnetic Waves

Energy Carried by Electromagnetic Waves

21.4 Energy, Power, and Intensity of Electromagnetic Waves

Anderson Video - Burning Holes with Sunlight

At one instant, an electromagnetic wave has a Poynting vector in the positive x direction and a magnetic field in the negative z direction. What is the direction of the electric field?

University Physics Lectures, Rate of Energy Transfer by Sinusoidal Waves on Strings

Anderson Video - Intensity

The Energy Carried by Electromagnetic Waves

Anderson Video - Intensity of the Sun Example

Anderson Video - Electromagnetic Energy

What is the average magnitude of the Poynting vector for an electromagnetic wave with magnetic field amplitude equal to <math display='inline'><mrow><mn>45</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">nT</mi></mrow></math>?

Anderson Video - Radiation Pressure

A <math display='inline'><mrow><mn>50</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">W</mi></mrow></math> light bulb emits light uniformly in all directions. What is the electric field amplitude <math display='inline'><mrow><mn>10</mn><mo rspace="thickmathspace">&#x2062;</mo><mi mathvariant="normal" class="MathML-Unit">cm</mi></mrow></math> away from the light bulb?

Intensity = 318 W/m2; Electric field intensity = 489 N/C; Magnetic field intensity = 1.63μT

Intensity = 7958 W/m2; Electric field intensity = 2448 N/C; Magnetic field intensity = 8.16μT

Intensity = 31830 W/m2; Electric field intensity = 4897 N/C; Magnetic field intensity = 16.3μT

Intensity = 7958 W/m2; Electric field intensity = 2448 N/C; Magnetic field intensity = 2.17 μT

A 100 W lightbulb actually emits around only 10 W of light. What is the intensity of the light 1 cm away if the light is emitted perfectly spherically? What is the magnitude of the electric field emitted by the lightbulb? What about the magnetic field?

phys2B ch24.4 The Energy Carried by Electromagnetic Waves

Energy Density of Electromagnetic Waves (Light) | Doc Physics

Suppose a certain star has a temperature of <math display=“inline”><mrow><mn>7000</mn><mtext>&#x00A0;</mtext><mi mathvariant="normal">K</mi><mo>.</mo></mrow></math> At what wavelength will this star emit the most energy?

Energy Density of Electromagnetic Waves

Learn the toughest concepts covered in Physics with step-by-step video tutorials and practice problems by world-class tutors

Patrick

Physics

https://static.studychannel.pearsonprd.tech/courses/physics/thumbnails/physics

#FFFFFF

Doc Schuster

z physics

Andrey K

Chad's Prep

Jose Menchaca

Patrick Ford

Leila Jewell

Diana Driscoll

Professor Anderson

1. Intro to Physics Units

2. 1D Motion / Kinematics

3. Vectors

4. 2D Kinematics

5. Projectile Motion

6. Intro to Forces (Dynamics)

7. Friction, Inclines, Systems

8. Centripetal Forces & Gravitation

9. Work & Energy

10. Conservation of Energy

11. Momentum & Impulse

12. Rotational Kinematics

13. Rotational Inertia & Energy

14. Torque & Rotational Dynamics

15. Rotational Equilibrium

16. Angular Momentum

17. Periodic Motion

18. Waves & Sound

19. Fluid Mechanics

20. Heat and Temperature

21. Kinetic Theory of Ideal Gases

22. The First Law of Thermodynamics

23. The Second Law of Thermodynamics

24. Electric Force & Field; Gauss' Law

25. Electric Potential

26. Capacitors & Dielectrics

27. Resistors & DC Circuits

28. Magnetic Fields and Forces

29. Sources of Magnetic Field

30. Induction and Inductance

31. Alternating Current

33. Geometric Optics

34. Wave Optics

36. Special Relativity

[BOOK PHYS] !CLUTCH

The Electromagnetic Spectrum

Displacement Current and Maxwell's Equations

What is an Electromagnetic Wave?

Polarization Filters

Electromagnetic Waves as Sinusoidal Waves

General Chemistry

Jules

Study the key concepts of Physics with descriptive videos, questions, and more

General Biology

Jason

Financial Accounting

Brian

Dive deep into Psychology with videos, practice problems, and more.

Psychology

Microeconomics

The first in a two-course sequence introduces the basic structure and functions of the human body

Anatomy & Physiology

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

College Algebra

Organic Chemistry

Johnny

Genetics

Kylia

GOB Chemistry

Microbiology

Cell Biology

Analytical Chemistry

Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

Trigonometry

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

Precalculus

Biochemistry

Macroeconomics

Chemistry

Biology

Math

Business

Social Sciences

Michelle Barry Franco

Building Great Presentations

Eric Zackrison, PhD

Critical Thinking And Problem Solving

Sam Bennett

Embracing Times Of Uncertainty

Nicole Tetreault, PhD

Emotional Intelligence Basics

Eugene Choi, PharmD

Enhancing Your Critical Thinking Skills

Jason Richardson, PsyD

Habits To Win Every Day

Alyssa Lowery, PhD

Having Powerful Advanced Conversations

Don Gilman, EdD

How To Influence & Persuade

Amy Matthews

Leadership Skills For Rising Stars

Listening To Lead

Michael Shermer, PhD

Making Decisions Under Uncertainty

Lynne Hurdle

Mistakes To Avoid When Resolving Conflict

Michael Veltri

Overcoming Decision Making Traps

Mike Vardy

Prioritizing Effectively

Secrets Of Effective Prioritization

Strategies To Build Up Your Creativity

Tools For Decision Making

Tutti Taygerly

Unleash And Advance Your Creativity

Winning Collaboration: How To Work More Effectively With Different Personalities

Writing Emails People Want To Read

Critical Thinking

Self Management

Digital Literacy

Collaboration

Communication

Analytical Thinking

Leadership

Flexibility/Adaptability

Innovation

Eric Zackrison

Nicole Tetreault

Dive deep into Python with videos and more.

Introduction to Python

Arianne Dee

Agile Project and Product Management

Agile & Product Management

Mariya Breyther 

Introduction to Microsoft Power BI

Microsoft Power BI

Chris Sorensen

Data Analysis Fundamentals with Excel

Data Analysis - Excel

Chris Sorensen & Ammul Shergill

Getting Started with  and Cryptocurrency

Introduction to Blockchain

George Levy

Learn Enough HTML, CSS and Layout to be Dangerous

HTML, CSS & Layout

Lee Donahoe & Michael Hartl

Learn Enough JavaScript to be Dangerous: A Tutorial Introduction to Programming with JavaScript