Jan 15, 2023 07:26 PM
In 1864, James Clerk Maxwell published a paper unifying electricity and magnetism. Two phenomenon that were familiar since ancient times.
Electricity could be seen in some materials that, when rubbed, would attract light objects to them. As well as in natural phenomenon such as lightening. Magnetism could be seen in compasses which were influenced by the earth's magnetic field which reached above its surface.
It was not until 1877 that Heinrich Hertz experimented with electromagnetic waves (made possible by Maxwell's equations), that radio waves were born. His equipment was crude. It involved an electric spark jumping between a gap to produce electromagnetic waves in a wire across the room.
Skip to 1947, the first transistor was born and in 1955 the first transistor car radio was made a reality.
Electricity could be seen in some materials that, when rubbed, would attract light objects to them. As well as in natural phenomenon such as lightening. Magnetism could be seen in compasses which were influenced by the earth's magnetic field which reached above its surface.
It was not until 1877 that Heinrich Hertz experimented with electromagnetic waves (made possible by Maxwell's equations), that radio waves were born. His equipment was crude. It involved an electric spark jumping between a gap to produce electromagnetic waves in a wire across the room.
Skip to 1947, the first transistor was born and in 1955 the first transistor car radio was made a reality.