Electromagnetic Waves in General Physics - Lecture 21.2

Explore the fundamentals of electromagnetic waves in this comprehensive 27-minute physics lesson. Begin with an introduction to Maxwell's Equations, which unified electricity and magnetism into a single theory of electromagnetism. Discover how these equations led to the prediction of electromagnetic waves, consisting of perpendicular electric and magnetic fields propagating at the speed of light. Learn about the novel concept of changing electric fields causing magnetic fields and vice versa, and understand how alternating current produces electromagnetic waves. Examine the properties of electromagnetic waves, including wavelength, frequency, speed, and interference patterns, with a focus on their transverse nature. Delve into the electromagnetic spectrum, covering its seven regions from gamma rays to radio waves, and understand the inverse relationship between frequency and wavelength. Investigate the intensity of light as it propagates in spherical waves and explore the Doppler Effect as applied to electromagnetic waves. Conclude the lesson by solving practice problems to reinforce your understanding of these concepts.

Lesson Introduction
Maxwell's Equations
Alternating Current Produces Electromagnetic Waves
Properties of Electromagnetic Waves
The Electromagnetic Spectrum
Light Intensity and the Doppler Effect
Electromagnetic Waves Practice Problems