In contrast to mechanical waves, electromagnetic waves can travel without a medium. This implies that electromagnetic waves can pass not only through solid objects like air and rock but also through empty space.
James Clerk Maxwell, a Scottish scientist, created a scientific theory to explain electromagnetic waves in the 1860s and 1870s. He realized that electromagnetic waves can be created when magnetic and electrical fields combine together. He compiled this electricity-magnetism relationship into what are now known as "Maxwell's Equations."
German physicist Heinrich Hertz used Maxwell's theories to explain how radio waves are transmitted and received. In honour of Heinrich Hertz, the hertz, or one cycle per second, is the unit of radio wave frequency. Two issues were resolved by his radio wave experiment. First, he had proven that the speed of radio waves was the same as the speed of light, which was something Maxwell had only theorized.
This demonstrated how radio waves are a type of light. Second, Hertz discovered how to create electromagnetic waves by causing the electric and magnetic fields to separate from wires.
learn more
brainly.com/question/25847009
#SPJ9
Answer:
horses were introduced to Europe by the Americans.
<span>The population of Europe declined by around 1/3 (like 27-33%) and most of which was the peasantry. This lack of peasantry didn't mean that the work they had to do was also diminished. They still had to do all the work, only with less numbers. This increased amount of labor lead to unrest in the societies in the Medieval era. They demanded a type of increased wage, or allowance of food/ration, and eventually gained some ground, which led a sort of Yeoman class, (emerging lower class) in England, and the bourgeoisie, for example, in France.</span>
Answer:
Explanation:
While Lincoln took a moderate approach to Reconstruction, Congress sought to impose ... President Johnson proved to be an obstacle to the Radical Republicans in Congress, ... assassination, attempted to continue Lincoln's vision for Reconstruction.
