"Has been a lifesaver so many times!"
- Catherine Rampell, student @ University of Washington
"Exactly the help I needed."
- Jennifer Hawes, student @ San Jose State
"The best place for brainstorming ideas."
- Michael Majchrowicz, student @ University of Kentucky
The electromagnetic spectrum is made up of six different types of
waves. Radio waves, Microwaves, Infrared waves, Visible light, Ultraviolet
light, X-rays and Gamma rays. The radio waves are used to transmit radio
and television signals. The infrared waves are used to tell temperature
of areas. Visible light is all the colors that we can see. Ultraviolet
light can help things grow but to much can cause diseases such as skin
cancer. X-rays are used as a tool to find broken bones or take pitchers of
our sun. Gamma rays are used in medical science but they are oftenly used
to produce images of our universe. If you would like to know more about
the spectrum keep reading.
The electromagnetic spectrum is the organization of six diferent
wavelengths. Each having their own use. The spectrum in order from longest
to shortest wavelengths is: Radio waves, Microwaves, Infrared waves,
Visible light, Ultraviolet light, X-rays and Gamma rays. The most
familiar forms of the spectrum are radio waves and light waves. The
reason for that is, that we listen to the radio or use its waves more
often than we think. For instance cell phones work off of radio waves.
Light waves are used more often than we think because with out light we
wouldent posibly be able to see color on any thing, or we wouldent have
photosynthisis which sunlight is used for. The term spectrum refers to
light in general or the whole range of electromagnetic radiation. The
electromagnetic field was found in the 19th centurie. It was founded by
James Clerk MAXWELL of Scotland and published in 1865. The field is
described in two quantities the electric component E and the magnetic
component B and both charge in space and time. This meaning
electric / magnetic / spectrum.
Radio waves are used to transmit radio and television signals.
Radio waves can send sounds at the speed of light. The range of radio
waves can be less than a centimeter to tens or even hundredths of meters.
Radio waves are produced by coherent motion of electrons such as the
antenna of a radio transmitter. Coherent motion is the focused pattern of
the waves, in this case. The radio waves are also produced by charged
particles orbiting in magnetic fields. As you already know we have FM and
AM radio waves. Well an FM radio station at 100 on the radio dial (100
megahertz) would have a wavelength of about 400 meters. A radio wave can
also be used to create images such as portable TVs. Radio waves with
wavelengths of a few centimeters can be transmitted from a satellite or
airplane antenna. The reflected waves can be used to form an image of the
ground in complete darkness or through clouds. This would be how spy
satellites work or how we take pictures of the planets surface.
Following after radio waves would be the magnificent microwave.
The microwave makes up a very small part of the spectrum although it is
widely used throughout house holds across the world. Microwaves range from
a few centimeters to 0.1 cm. The wave is used to heat your food. It heats
your food by bouncing back and fourth across the microwave walls. In the
process it causes molecules (tiny particles) to vibrate and create
friction which in turn creates heat.
Infrared is the region of the electromagnetic spectrum that
extends from the visible region to about one millimeter (in wavelength)
Infrared waves include thermal radiation. For example hot or burning
charcoal may not give off light but it does send out radiation its just
felt as heat. The infrared radiation is or can be measured using detectors
. Infrared has many applications in medicine or finding heat leaks in
houses. This is what gives us the ability to see in the dark with infrared
goggles to tell us what is putting off heat . It is also used in space
science exploration to tell us the climate of other planets or even the
heat of the sun.
The rainbow of colors we know as visible light is the portion of
the electromagnetic spectrum with wavelengths. A wavelength is the
distance between consecutive peaks of consecutive valleys in wave form.
The reason we can see all the colors we do is simple. The light of the
world reflects off the objects giving it color. Such as when it is sunny
out every thing the sun hits is more visible and we can see its color. The
moon works the same way it's just less light making it harder to see the
color. Now Im a scuba diver and when
View Full Essay
Electromagnetic spectrum, Radiation, Waves, Medical physics, Radioactivity, Electromagnetic radiation, Infrared, Light, Gamma ray, Microwave, Sunlight, Ultraviolet
More Free Essays Like This