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The Electromagnetic Spectrum
Transcript of The Electromagnetic Spectrum
Short energy waves (1-100 gigahertz) that are about 3mm to 30cm.
The only part of the spectrum visible to humans.
What is the electromagnetic spectrum?
The full range of seven different types of radiation.
Radio waves: The longest waves in the EM spectrum. (1mm -100 km)
Some stretch on for miles!
Thermal radiation (heat)
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
The highest level of radiation in the spectrum.
These rays come from
effects of exposure to gamma rays
1. Radiation sickness
2. DNA damage
3. Cell death
4. Increased risk of cancer
5. Internal damage.
Federal Communications Commission
Numbers, Numbers, numbers
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
Let's get digital!
Smarter than your average antenna
Meshing it all together
Thanks For Listening!
Resource scarcity and the Future of the Radio Spectrum
By Erika Sims
( less than 10 pm)