5. Producing Electromagnetic Waves
Maxwell’s electromagnetic equations
states that an oscillating electric current
should be capable of radiating energy in the
form of a wave known as electromagnetic
waves (EM waves) that would travel as fast
as the speed of light.
8. Producing Electromagnetic Waves
discovered Hertzian wave – an
electromagnetic radiation produced
by
electrical
oscillation
in
a
conductor, of wavelengths ranging
from the order of millimetres to
kilometres.
20. The Electromagnetic Spectrum
Radio and TV waves
are waves that have the longest
wavelengths and the lowest frequencies
in the electromagnetic spectrum. They
can be produced by making electricity
oscillate in an aerial.