Overview
Electromagnetic waves are a fundamental aspect of physics, representing energy that travels through space at the speed of light. They encompass a wide range of phenomena, from radio waves used in communication to visible light that allows us to see. Understanding these waves is crucial for various a...
Key Terms
Example: The wavelength of visible light is about 400-700 nanometers.
Example: Radio waves can have frequencies from 3 kHz to 300 GHz.
Example: Photons are emitted when an electron drops to a lower energy level.
Example: The electromagnetic spectrum includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Example: Higher amplitude waves carry more energy.
Example: Light from the Sun takes about 8 minutes to reach Earth.