Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Erasistratus to Federalism


albert theory scientists medium

Ether, or aether, in physics, hypothetical substance that was once believed essential for transmission of light waves through space. Scientists assumed that waves required some medium. Observations of stars had suggested that the ether must be stationary in space, and that the earth therefore moved through it. In 1887 the U.S. scientists Albert A. Michelson and Edward W. Morley tried to measure the effect of the “ether wind,” but found no sign of it. The theory of ether was finally abandoned when Albert Einstein's theory of relativity showed that electromagnetic radiation is not a mechanical distortion of a medium, but a type of energy that travels through a vacuum.

Ether [next] [back] Ethane

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or