Electromagnetic waves

luanawho
Mind Map by luanawho, updated more than 1 year ago
luanawho
Created by luanawho about 5 years ago
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Description

The electromagnetic spectrum descriptions and properties

Resource summary

Electromagnetic waves
1 Properties
1.1 All possess both a magnetic wave and an electrical wave interlocked and at right angles to each other
1.2 All can travel through a vacuum
1.3 All transverse waves
1.4 In free space travel at approx. 300,000,000 m/s
2 Types
2.1 Radio waves
2.1.1 Wavelength - 10^-1 - 10^4
2.1.2 Frequency - 3x10^9 - 3x10^4
2.1.3 Made by electrons oscillated by electric fields in aerials
2.1.4 Detected by resonance in electric circuits
2.1.5 Used for telecommunications
2.2 Microwaves
2.2.1 Wavelength - 10^-4 - 10^-1
2.2.2 Frequency - 3x10^12 - 3x10^9
2.2.3 Produced by magnetron, klystron oscillators, using electrons to set up oscillations in a cavity
2.2.4 Detected by heating effect and electronic circuits
2.2.5 Used for mobile phones, radar, microwave ovens
2.3 Infrared
2.3.1 Wavelength - 7.4x10^-7 - 10^-3
2.3.2 Frequency - 4x10^14 - 3x10^11
2.3.3 Produced by the oscillation of molecules from all objects at any temp above absolute 0
2.3.4 Detected by heating of skin, photographic film
2.3.5 Used for heaters, night vision equipment, remote controls
2.4 Visible light
2.4.1 Wavelength - 3.7x10^-7 - 7.4x10^-7
2.4.2 Frequency - 8x10^14 - 4x10^14
2.4.3 Produced from high-temp solids and gases, lasers
2.4.4 Detected by photographic film, retina of eye
2.4.5 Used for sight, communication
2.5 Ultraviolet
2.5.1 Wavelength - 10^-9 - 3.7x10^-7
2.5.1.1 Frequency - 3x10^17 - 8x10^14
2.5.2 Produced by high-temp solids and gases
2.5.3 Detected by photographic film, phosphors and sunburn
2.5.4 Used for disco lights,
2.6 X-Rays
2.6.1 Wavelength - 10^-12 - 10^-7
2.6.2 Frequency - 3x10^20 - 3x10^15
2.6.3 Produced by bombarding metals with high energy electrons
2.6.4 Detected by photographic film or fluorescence
2.6.5 Used for medical analysis
2.7 Gamma
2.7.1 Wavelength - 10^-16 - 10^-9
2.7.2 Frequency - 3x10^17 - 3x10^24
2.7.3 Produced by nuclear decay or by a nuclear accelerator
2.7.4 Detected by a Geiger counter or photographic film
2.7.5 Used for radiotherapy - cancer treatment
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