Electromagnetic Waves Spectrum Waves Electromagnetic waves Crest waves
















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Electromagnetic Waves & Spectrum

Waves �Electromagnetic waves. �Crest- waves are transverse top of wave. �Trough- bottom of wave. �Wavelength- can be measured as the distance from crest to crest or from trough to trough.

Electromagnetic Waves �Electromagnetic waves- are made up of electric and magnetic fields. �They are a result of particles vibrating back and forth. �Requires NO medium.

Electromagnetic Waves �Transfer of energy through EM waves is called radiation. �All EM waves travel through empty space at 300, 000 km/s.

Frequency �Frequency- the number of waves that pass in a given amount of time. �Frequency � 1 is measured in Hertz (Hz). Hz is equivalent to 1 cycle/second.

Frequency �A longer wavelength means a lower frequency, and a shorter wavelength means a higher frequency!

Electromagnetic Spectrum �Going from strongest to weakest � Gamma � X-Rays � Ultraviolet light � Visible light � Infrared � Microwaves � Radio waves

Gamma Rays • Kills cancer • Kills bacteria • Penetrates materials

X- Rays �Medical imaging

Ultraviolet light • Above violet • Sunburns • Kill bacteria • Produces Vitamin D

Visible light �ROY G BIV

Color wavelengths �Infrared – 10 cm �Red – 7. 5 cm �Orange – 6. 3 cm �Yellow – 5. 75 cm �Green – 5. 3 cm �Blue – 4. 5 cm �Indigo – 4. 3 cm �Violet – 4. 0 cm �Ultraviolet – 0. 3 cm

Infrared • Below red • Temperature • Night vision • T. V remotes

Microwaves ◦ Cell phones ◦ Satellites ◦ Radar

Radio Waves • Radio and T. V • A. M. (amplitude modulation) • F. M. (frequency modulation)

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Electromagnetic wavelength range
Mechanical waves and electromagnetic waves similarities
Electromagnetic waves are longitudinal waves true or false
Mechanical waves vs electromagnetic waves
Example of mechanical waves
Similarities of mechanical and electromagnetic waves
Mechanical waves and electromagnetic waves
Venn diagram of mechanical and electromagnetic waves
Do electromagnetic waves require a medium
The highest part of a wave
Copper orbital diagram
Absortpion
Electromagnetic spectrum longest to shortest wavelength
Electromagnetic waves table
Types of radiation in the electromagnetic spectrum
Electromagnetic spectrum micrometers
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