Regions of the Spectrum
Spectrum contain all the ranges such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays, and also known as the electromagnetic spectrum. The wavelength or frequency that characterises these portions of the electromagnetic spectrum determines their characteristics and applications.
RADIO WAVES:
The region of the spectrum with the longest wavelengths, ranging from hundreds of metres to thousands of kilometres, are radio waves.
Uses of radio waves:
- satellite communications.
- cell phones.
- and radio and television broadcasts.
MICROWAVE:
Microwaves have wavelengths
- ranges from one millimetre and one metre
- making them shorter than radio waves
- but longer than infrared radiation.
Uses of microwave:
Microwave used in
- satellite communications,
- radar, and microwave ovens.
INFRARED RADIATION:
Longer than visible light, infrared radiation has wavelengths between 700 nanometers and one millimetre. used in remote controls and thermal imaging cameras.
VISIBLE REGION
The portion of the spectrum with wavelengths between 400 and 700 nanometers that can be seen by human eyes is known as visible light.
USES OF VISIBLE RANGE:
used for presentations, photography, and lighting.
ULTRAVOILET RADIATION:
Shorter than visible light, ultraviolet radiation has wavelengths between 10 and 400 nanometers. used in tanning beds, black lights, and sterilisation.
X- RAYS:
Shorter than ultraviolet energy, X-rays have wavelengths between 0.01 and 10 nanometers.
USES:
used in radiation therapy and medical imaging.
GAMMA RAYS:
The part of the spectrum with the shortest wavelengths, less than 0.01 nanometers, is called the gamma ray.
USES:
used for cancer imaging and treatment; produced by nuclear processes.