Marbury v. Madison (1803) Summary: Marbury v. Madison, 5 U.S. 137, was a U.S. Supreme Court case that established the precedent of judicial review. This judicial review power allows the Supreme Court to invalidate or declare unconstitutional actions or laws created by levels of government. The case surrounds the question of whether or not William Marburyâs right to a commission is valid and if he is due a mandamus from the court.
An electromagnetic (EM) wave is not a sound wave. A sound wave is mechanical energy, and an electromagnetic wave is electromagnetic energy. The EM wave could be a radio or light wave, but in any case, it is composed of moving electric and magnetic fields. This electromagnetic wave can move through air or the vacuum of space, but sound (or any mechanical wave) must have a medium to travel through.
Electromagnetic energy is familiar to most people as light and heat, but it can take many other forms, such as radio waves and X-rays. These are all types of radiation originating from the electromagnetic force, which is responsible for all electrical and magnetic phenomena. The radiation travels at the speed of light in a manner resembling waves. Unlike sound waves, electromagnetic waves do not require a medium through which to move and can travel across empty space.