CBSE Papers, Questions, Answers, MCQ ...: Class 12 - Physics - ELECTROMAGNETIC WAVES AND OPTICS - About Electromagnetic Spectrum? (#cbsenotes)(#eduvictors)

Class 12 - Physics - ELECTROMAGNETIC WAVES AND OPTICS -

About Electromagnetic Spectrum

Electromagnetic Spectrum
credits: wikimedia, author: penbaug

Name	Wavelength range	Production	Uses
Gamma Rays	10⁻ⁱ²m	Gamma rays produced in the radioactive decay of the nucleus	In the treatment of cancer and to carry out nuclear reactions.
X-Rays	10⁻⁹m - 10⁻ⁱ²m	x-rays tubes or inner shell electrons	Used as a diagnostic tool in medical to find out fractures in bones. to find cracks, flaws in the metal part of a machine
UV Rays	4×10⁻⁷m - 10⁻⁹m	By very hot bodies like the sun and by UV lamps.	In water purifier in the detection of forged documents, in food preservation.
Visible Light	7×10⁻⁷m - 4×10⁻⁷m	by accelerated tiny (electrons) charge particles.	to see every thing around us.
Infra Red Rays (IR)	10⁻³m - 7×10⁻⁷m	due to vibration of atoms	in green houses to keep the plant warm. to reveal secret writings on walls in photography. during fog and smoke
Microwaves	10⁻ⁱm - 10⁻³m	produced in klystron Valve and magnetron Valve	in microwave ovens, in RADAR
Radio waves	> 0.1m	by accelerated charged particles, in electrical circuits as RF transmitter	in radio telecommunication system in radio astrology