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21.4 Energy, Power, and Intensity of Electromagnetic Waves

Chad's General Physics Videos

Course Menu

Chapter 1 – Units and Vectors
- 1.1 SI Units & Dimensional Analysis
- 1.2 Significant Figures & Scientific Notation
- 1.3 Unit Conversions & the Metric System
- 1.4 Vectors
Chapter 2 – Motion in One Dimension
- 2.1 Displacement, Velocity, and Acceleration
- 2.2 Kinematics in One Dimension
- 2.3 Freely Falling Bodies
- 2.4 Motion Diagrams
Chapter 3 – Motion in Two Dimensions
- 3.1 Displacement, Velocity, and Acceleration in Two Dimensions
- 3.2 Projectile Motion
- 3.3 Relative Motion
Chapter 4 – The Laws of Motion
- 4.1 Newton’s Laws of Motion
- 4.2 Gravity, Normal Force, and Friction
- 4.3 Inclined Planes: Application of Newton’s Laws
- 4.4 Tension and Pulley Problems: Application of Newton’s Laws
Chapter 5 – Energy
- 5.1 Work
- 5.2 Mechanical Energy
- 5.3 Springs & Elastic Potential Energy
- 5.4 Power
- 5.5 Work Done by a Varying Force
Chapter 6 – Momentum and Collisions
- 6.1 Momentum and Impulse
- 6.2 Collisions in 1-Dimension
- 6.3 Collisions in 2-Dimensions
Chapter 7 – Rotational Motion and the Law of Gravity
- 7.1 Rotational Kinematics
- 7.2 Centripetal Force and Acceleration
- 7.3 Universal Gravity and Kepler’s Laws of Motion
Chapter 8 – Rotational Equilibrium and Dynamics
- 8.1 Torque
- 8.2 Center of Mass and Center of Gravity
- 8.3 Torque and Rotational Equilibrium
- 8.4 Moment of Inertia and Rotational Dynamics
- 8.5 Angular Momentum and Rotational Kinetic Energy
Chapter 9 – Solids and Fluids
- 9.1 Density and Pressure
- 9.2 Buoyant Force and Archimedes’ Principle
- 9.3 Fluid Dynamics
- 9.4 Elasticity of Solids
Chapter 10 – Gases
- 10.1 Temperature and Thermal Expansion
- 10.2 Ideal Gas Law and Kinetic Theory of Gases
Chapters 11/12 – Thermodynamics
- 11/12.1 Heat and Calorimetry
- 11/12.2 First Law of Thermodynamics
- 11/12.3 Entropy and the Second Law of Thermodynamics
Chapter 13 – Oscillatory Motion and Waves
- 13.1 Simple Harmonic Motion SHM, Springs, and Pendulums
- 13.2 The Frequency and Period of SHM
- 13.3 Waves
- 13.4 Standing Waves
Chapter 14 – Sound
- 14.1 Wave Nature and Speed of Sound
- 14.2 Sound Intensity and Intensity Level
- 14.3 Doppler Effect
Chapter 15 – Electric Forces and Fields
- 15.1 Charge, Insulators, and Conductors
- 15.2 Coulomb’s Law
- 15.3 Electric Fields
- 15.4 Conductors in Electrostatic Equilibrium
- 15.5 Gauss’s Law and Electric Flux
Chapter 16 – Electrical Energy and Capacitance
- 16.1 Electric Potential and Potential Energy
- 16.2 Capacitance and Parallel Plate Capacitors
- 16.3 Capacitors in DC Circuits
Chapter 17 – Current and Resistance
- 17.1 Current and Ohm’s Law
- 17.2 Resistance
- 17.3 Resistors in DC Circuits
- 17.4 Voltmeters and Ammeters
Chapter 18 – Complex Direct-Current (DC) Circuits
- 18.1 Sources of Emf
- 18.2 Complex Circuits and Kirchoff’s Rules
- 18.3 RC Circuits
Chapter 19 – Magnetism
- 19.1 Introduction to Magnetic Fields
- 19.2 Magnetic Force on a Charge in Motion
- 19.3 Magnetic Force on a Current Carrying Wire
- 19.4 Torque on a Current Carrying Loop
- 19.5 Magnetic Field Due to a Current Carrying Wire
- 19.6 Magnetic Field at the Center of a Current Carrying Loop
- 19.7 Magnetic Field at the Center of a Solenoid
- 19.8 Final Thoughts on Magnetism
Chapter 20 – Induced Voltages and Inductance
- 20.1 Introduction to Faraday’s Law and Lenz’s Law
- 20.2 Application of Faraday’s Law and Lenz’s Law
- 20.3 Motional Emf
- 20.4 Generators, Motors, and Back Emf
- 20.5 Mutual Inductance and Transformers
- 20.6 Self Inductance
- 20.7 RL Circuits
Chapter 21 – Alternating-Current (AC) Circuits
- 21.1 Rms Current and Voltage in AC Circuits
- 21.2 Maxwell’s Theory of Electromagnetism
- 21.3 Introduction to Electromagnetic Radiation
- 21.4 Energy, Power, and Intensity of Electromagnetic Waves
- 21.5 The Doppler Effect
- 21.6 The Polarization of Light
Chapter 22 – Reflection and Refraction of Light
- 22.1 Plane Mirrors and the Law of Reflection
- 22.2 Indexes of Refraction
- 22.3 Snell’s Law of Refraction
- 22.4 Total Internal Reflection
- 22.5 Apparent Depth
Chapter 23 – Mirrors and Lenses
- 23.1 Introduction to Spherical Mirrors and Thin Lenses
- 23.2 Concave Converging Mirrors
- 23.3 Convex Diverging Mirrors
- 23.4 Diverging Lenses
- 23.5 Converging Lenses
- 23.6 Calculations Involving Mirrors and Thin Lenses
Chapter 24 – Wave Optics
- 24.1 Double Slit Interference
- 24.2 Thin Film Interference
- 24.3 Diffraction Gratings and Single Slit Interference
Chapter 25 – Quantum Physics
- 25.1 Blackbody Radiation
- 25.2 The Photoelectric Effect
- 25.3 The Bohr Model of the Atom and Electronic Transitions
- 25.4 The Compton Effect
- 25.5 The DeBroglie Wavelength of Matter
- 25.6 Wave Functions
- 25.7 The Heisenberg Uncertainty Principle

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