Graphics Reference
In-Depth Information
Figure 1. Complete spectrum of electromagnetic radiation with the visible portion highlighted (http://
en.wikipedia.org/wiki/Frequency. Text is available under the Creative Commons Attribution-ShareAlike
License)
Figure 2. Wavelengths (in meters) and communication (© 2012, Matthew Rodriguez. Used with permission)
Table 1. Terms about electromagnetic spectrum
10
-16
Gamma rays
Information about Cosmos
10
-12
X rays
Instruments for gathering and communicating information
10
-9
m Nanometers
Information about organism or their parts, and inanimate structures
10
-8
10 nanometers
Ultraviolet; seen by some animals, e.g., birds, bats, dolphins, sharks, many insects, e.g., bees
10
-6
Visible
Light, colors, visual communication
10
-5
Infrared
Light invisible for humans but felt like heat; visible for some animals
10
-4
Microns
Recorded by humans with sensors
10
-3
Millimeters
Ultrasound has a wavelength (below 20 Hz) from 0.3 micrometers to nanometer. Ultrasounds (20 kHz to over
200 MHz) are received by animals, such as bats, insects, dogs, dolphins, whales, and fish
10
0
Meters
Radio; Sound and verbal communication; radio; drums as a code; music and visual music
