ELECTROMAGNETIC SPECTRUM DETAILS

GAMMA RAYS
	Wavelength range: 10-14 to 10-10  meter  Frequency range: 3x1018 to 3 x 1022 Hz Production: Nuclear origin. Emitted on disintegration of Nuclei of atoms. Properties: Highly penetrating and uncharged. Exhibits Fluorescence, Phosphorescence, ionization and chemical reaction on photographic plates. Uses: gives information about structure of nuclei.
X-rays
	Wavelength range: 10-10 to 10-8  meter  Frequency range: 3x1016 to 3 x 1018 Hz Production: by striking high speed electrons on heavy target. Properties: All properties of gamma rays but less penetrating. Uses: helpful in medical diagnosis, study of crystal structure.
U V REGION
	Wavelength range: 10-8 to 4x10-7  meter  Frequency range: 8x1014 to 3 x 1016 Hz Production: by sun, arc, spark and ionized gases. Properties: All properties of gamma rays but less penetrating. They can produce photoelectric effect. Uses: used in medical applications. Detection of finger prints, forged documents.
VISIBLE
	Wavelength range: 4x10-7 to 7.8x10-7  meter  Frequency range: 4x1014 to 8 x 1014 Hz Production: radiated from ionized gases and incandescent bodies. Properties: exhibit reflection, refraction, interference, diffraction, polarization, photoelectric effect, sensation of sight. Uses: used in LASER technology.
INFRARED
	Wavelength range: 7.8x10-7 to 10-3  meter  Frequency range: 3x1011 to 4 x 1014 Hz Production: by hot bodies Properties: heating effect on thermo piles and bolometer. Exhibit reflection, refraction, diffraction and photographic action. Uses: used in industry, astronomy & medicine etc.
HERTZIAN WAVES/ MICROWAVES
	Wavelength range: 10-3 to 1 meter.  Frequency range: 109 to 3 x 1011 Hz Production: by spark discharge, by electronic devices such as Klystron & Magnetron. Properties: Reflection, Refraction & Diffraction. Produces spark in gaps and receiving circuits. Uses: used in Radar and MASERs and also to reveal finer details of atomic and molecular structure.
RADIO WAVES
	Wavelength range: 1 TO 104 meter. Frequency range: 10 KHz to 30 GHz Production: oscillating circuits and electronic devices. Properties: exhibits Reflection, Refraction & Diffraction. Uses: used in television and radio broadcast system.