Essay on The Electromagnetic Spectrum
The electromagnetic spectrum is the collective name for all types of radiation. Radiation is energy that travels around in waves. The electromagnetic spectrum goes from the waves with the lowest energy to those with the highest energy.
Radio waves have the longest wavelengths in the electromagnetic spectrum. They can be from as long as a football to as long as a football pitches. Radio waves carry signals from devices from one place to another invisibly through the air.
Radio waves are used for many different jobs:
b In Medicine - radio waves are used to transmit the pattern of a heartbeat through a monitor at a patient's …show more content…
Radio telescopes look toward the heavens at planets and comets, giant clouds of gas and dust, and stars and galaxies. By studying the radio waves originating from these sources, astronomers can learn about their composition, structure, and motion. Radio astronomy has the advantage that sunlight, clouds, and rain don't affect observations.
Microwaves are measured in centimetres because they are so big. They range in size but it is the larger ones that we use to heat or food in a microwave oven.
Microwaves are good for transmitting information from one place to another because microwave energy can penetrate haze, light rain and snow, clouds, and smoke.
[IMAGE]Shorter microwaves are used in remote