give the wavelength range of the electromagnetic spectrum
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RegionWavelength range (approx.)Frequency range (approx.) CommentsLong-wave radio
>10 m<3x107 hzIncludes traditional AM radio region. These frequencies can travel long distances by multiple reflections between the surface of the earth and its ionosphere.Short-wave radio10 cm - 10 m3x107 - 3x109Used for TV, FM, and other communication purposes. Generally travels only relatively short distances because the ionosphere is transparent to it.Microwave1 mm - 10 cm3x109 - 3x1011Present limit of radio technology for most purposes.Far infrared30 mm - 1 mm3x1011 - 10133 K radiation fills universe.Thermal infrared3 mm - 30 mm1013 - 1014Thermal emission of earth and planets.Near infrared700 nm - 3mm1014 - 4x1014Solar and stellar emission.Visible400 nm -700nm
(1.7 - 3 eV)4x1014 -7x1014Peak of solar radiation. Visible to human eye, standard photographic film and CCD video detectors.Ultraviolet200 nm -400nm
(3 - 6 eV)7x1014 -
1.5x1015Divided at 300 nm by atmospheric (ozone) cutoff. Appreciable solar flux causes sunburn.Vacuum UV (EUV)10 nm - 200 nm
(6 - 120 eV)1.5x1015 -3x1016Very strong absorption in matter, hence very difficult to observe.X-rays120 eV-100keV3x1016 -3x1019Produced by electron beams in X-ray tubes, and by inner atomic transitions. Progressively more penetrating as E increases, up to many centimeters in water.g-rays100 keV3x1019Produced by nuclear and other high energy processes. Can penetrate up to meters in water.
>10 m<3x107 hzIncludes traditional AM radio region. These frequencies can travel long distances by multiple reflections between the surface of the earth and its ionosphere.Short-wave radio10 cm - 10 m3x107 - 3x109Used for TV, FM, and other communication purposes. Generally travels only relatively short distances because the ionosphere is transparent to it.Microwave1 mm - 10 cm3x109 - 3x1011Present limit of radio technology for most purposes.Far infrared30 mm - 1 mm3x1011 - 10133 K radiation fills universe.Thermal infrared3 mm - 30 mm1013 - 1014Thermal emission of earth and planets.Near infrared700 nm - 3mm1014 - 4x1014Solar and stellar emission.Visible400 nm -700nm
(1.7 - 3 eV)4x1014 -7x1014Peak of solar radiation. Visible to human eye, standard photographic film and CCD video detectors.Ultraviolet200 nm -400nm
(3 - 6 eV)7x1014 -
1.5x1015Divided at 300 nm by atmospheric (ozone) cutoff. Appreciable solar flux causes sunburn.Vacuum UV (EUV)10 nm - 200 nm
(6 - 120 eV)1.5x1015 -3x1016Very strong absorption in matter, hence very difficult to observe.X-rays120 eV-100keV3x1016 -3x1019Produced by electron beams in X-ray tubes, and by inner atomic transitions. Progressively more penetrating as E increases, up to many centimeters in water.g-rays100 keV3x1019Produced by nuclear and other high energy processes. Can penetrate up to meters in water.
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the wavelength is of 1 mm to 750 nm long
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