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billable · 07-16-2006, 10:12 AM

If you need technical information about light, this may help.

Approximate wavelength (in vacuum) and frequency ranges for the various colors

Color Wavelength (nm)
Red 780 - 622
Orange 622 - 597
Yellow 597 - 577
Green 577 - 492
Blue 492 - 455
Violet 455 - 390

Frequency (THz)
Red 384 - 482
Orange 482 - 503
Yellow 503 - 520
Green 520 - 610
Blue 610 - 659
Violet 659 - 769

1 terahertz (THz) = 103 GHz = 106 MHz = 1012 Hz,
1 nm = 10-3 um = 10-6 mm = 10-9 m.
The white light is a mixture of the colors of the visible spectra.
The electromagnetic and sound specta and their use for communication

Wavelengths is a common way of describing light waves.
Wavelength = Speed of light in vacuum / Frequency.The speed of light is the velocity of electromagnetic wave in vacuum, which is 300,000 km/sec. Light travels slower in other media, and different wavelengths travel at different speeds in the same media. When light passes from one media to another, it changes speed, which causes a deflection of light called refraction. The index of refraction, n, is defined as the following ratio:
n = Speed of light in vacuum / Speed of light in a specific medium. Prefix:Symbol:Magnitude:Meaning (multiply by):Yotta- Y10241 000 000 000 000 000 000 000 000Zetta- Z10211 000 000 000 000 000 000 000 Exa- E10181 000 000 000 000 000 000 Peta- P10151 000 000 000 000 000 Tera- T10121 000 000 000 000 Giga- G1091 000 000 000 Mega- M1061 000 000 myria- my10410 000 (this is now obsolete) kilo- k1031000 hecto- h102100 deka- da1010 - -- - deci- d10-10.1 centi- c10-20.01 milli- m10-30.001 micro- u (mu)10-60.000 001 nano- n10-90.000 000 001 pico- p10-120.000 000 000 001 femto- f10-150.000 000 000 000 001 atto- a10-180.000 000 000 000 000 001 zepto- z10-210.000 000 000 000 000 000 001 yocto- y10-240.000 000 000 000 000 000 000 001

Uva is the closest Uv section to the visible spectrum. The UV spectrum is divided into Extreme UV (1-40nm) Vacuum UV (40-190 nm), Far UV (190-220 nm), UVC (220-290 nm), UVB (290-320), and UVA (320-400 nm). The shorter the wavelength, the higher the frequency.

07-16-2006, 10:12 AM	#1 (permalink)
billable I'm Banned Join Date: Feb 1 2006 Location: Tennessee Age: 47 Posts: 4,181 Rep Power: 0	Light for dummies If you need technical information about light, this may help. Approximate wavelength (in vacuum) and frequency ranges for the various colors Color Wavelength (nm) Red 780 - 622 Orange 622 - 597 Yellow 597 - 577 Green 577 - 492 Blue 492 - 455 Violet 455 - 390 Frequency (THz) Red 384 - 482 Orange 482 - 503 Yellow 503 - 520 Green 520 - 610 Blue 610 - 659 Violet 659 - 769 1 terahertz (THz) = 103 GHz = 106 MHz = 1012 Hz, 1 nm = 10-3 um = 10-6 mm = 10-9 m. The white light is a mixture of the colors of the visible spectra. The electromagnetic and sound specta and their use for communication Wavelengths is a common way of describing light waves. Wavelength = Speed of light in vacuum / Frequency.The speed of light is the velocity of electromagnetic wave in vacuum, which is 300,000 km/sec. Light travels slower in other media, and different wavelengths travel at different speeds in the same media. When light passes from one media to another, it changes speed, which causes a deflection of light called refraction. The index of refraction, n, is defined as the following ratio: n = Speed of light in vacuum / Speed of light in a specific medium. Prefix:Symbol:Magnitude:Meaning (multiply by):Yotta- Y10241 000 000 000 000 000 000 000 000Zetta- Z10211 000 000 000 000 000 000 000 Exa- E10181 000 000 000 000 000 000 Peta- P10151 000 000 000 000 000 Tera- T10121 000 000 000 000 Giga- G1091 000 000 000 Mega- M1061 000 000 myria- my10410 000 (this is now obsolete) kilo- k1031000 hecto- h102100 deka- da1010 - -- - deci- d10-10.1 centi- c10-20.01 milli- m10-30.001 micro- u (mu)10-60.000 001 nano- n10-90.000 000 001 pico- p10-120.000 000 000 001 femto- f10-150.000 000 000 000 001 atto- a10-180.000 000 000 000 000 001 zepto- z10-210.000 000 000 000 000 000 001 yocto- y10-240.000 000 000 000 000 000 000 001 Uva is the closest Uv section to the visible spectrum. The UV spectrum is divided into Extreme UV (1-40nm) Vacuum UV (40-190 nm), Far UV (190-220 nm), UVC (220-290 nm), UVB (290-320), and UVA (320-400 nm). The shorter the wavelength, the higher the frequency.