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The Electromagnetic Spectrum

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by

Erika Sims

on 8 May 2014

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Transcript of The Electromagnetic Spectrum

The Electromagnetic

S
p
e
c
t
r
u
m
!

Microwaves
Short energy waves (1-100 gigahertz) that are about 3mm to 30cm.
Visible
L
i
g
h
t
The only part of the spectrum visible to humans.
What is the electromagnetic spectrum?
The full range of seven different types of radiation.
Gamma rays
X-rays
Ultraviolet
Visible Light
Infrared
Microwaves
Radio waves





Ultraviolet Rays
X-rays
G
amm
a

R
ay
s
Infrared
Radio waves: The longest waves in the EM spectrum. (1mm -100 km)


Some stretch on for miles!

Phones
Television
radio
Thermal radiation (heat)
Near
Mid
Far
The wavelength closest to visible light.
(2500- 750 nm)
Used for electronic devices
like remote controls.
Closer to microwaves.
High-energy and short wavelength radiation generated by the sun or black lights.
The 3 types of UV radiation
UV-A: 320-400 nm
99% of the UV radiation is this type.

UV-B: 290-320 nm

UV-C: 220-290 nm
are a form of ionizing radiation, which is dangerous to living tissue.
Besides medical issues, X-rays are used for:
1. Finding physical problems in patients
2. Scanning bags in the airport
3. Quantum mechanics theory
4. Crystallography
5. Cosmology
The highest level of radiation in the spectrum.
These rays come from
exploding stars
black holes
natural radioisotopes
lightning strikes
effects of exposure to gamma rays
1. Radiation sickness
2. DNA damage
3. Cell death
4. Increased risk of cancer
5. Internal damage.


The FCC

Federal Communications Commission
Numbers, Numbers, numbers


88-108
92-108
The Spectrum Drought
Due to the belief that new transmitters interfere with frequencies, the radio spectrum has been regulated.
Radio waves are responsible for many of today's means of communication.
The future of spectrum resources
3.
Common misconceptions
1.
2.
Let's get digital!
Ultra
wide
Smarter than your average antenna
Meshing it all together
Thanks For Listening!
Bibliography

Electromagnetic Spectrum
http://goo.gl/aBDrjd
Radio Waves
http://science.hq.nasa.gov/kids/imagers/ems/radio.html
http://electronics.howstuffworks.com/radio.htm
FCC
http://www.fcc.gov/
http://www.fcc.gov/encyclopedia/radio
http://www.fcc.gov/encyclopedia/radio-spectrum-allocation
Resource scarcity and the Future of the Radio Spectrum
http://spectrum.ieee.org/telecom/wireless/the-end-of-spectrum-scarcity
Limited sources
http://www.techcentral.co.za/spectrum-scarce-not-so-fast/42683/
Microwaves
http://science.howstuffworks.com/microwaves-info.htm
Infrared
http://science.hq.nasa.gov/kids/imagers/ems/infrared.html
Visible light
http://www.windows2universe.org/physical_science/magnetism/em_visible_light.html
https://www.boundless.com/physics/electromagnetic-waves/the-electromagnetic-spectrum/visible-light/
Ultraviolet
https://www.boundless.com/physics/electromagnetic-waves/the-electromagnetic-spectrum/ultraviolet-light/
X-ray
https://www.boundless.com/physics/electromagnetic-waves/the-electromagnetic-spectrum/x-rays/
Gamma rays
https://www.boundless.com/physics/electromagnetic-waves/the-electromagnetic-spectrum/gamma-rays/
http://searchmobilecomputing.techtarget.com/definition/smart-antenna
By Erika Sims
(10-2.5 μm)
(1mm-10 μm)
( less than 10 pm)
Full transcript