Properties of LASERDownload http://www.physiotherapyphd.com Properties of LASER: The laser differs from the ordinary light in the following ways: 1. Monochromaticity: This means that the laser light has a single color (mono-single, chromaticity—coloration). This is because the lasers are of a single wavelength and thus the definite frequency. Ordinary light however has many wavelengths. 2. Coherence:ContinueContinue reading “Properties of LASER”
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Facts of Ultrasound
Faradic current
Faradic currentDownload Faradic current http://www.physiotherapyphd.com During the 1830s, Faraday discovered that bidirectional electrical currents could be induced by a moving magnet. He called this current “Faradic current.” Faradic current can be used to produce muscle contractions. Faradic type current is short duration interrupted direct current with pulse duration of 0.1–1 ms and frequencies between 50–100ContinueContinue reading “Faradic current”
Infra-red radiation – Types and Effects
Infra red radiation – types and effectsDownload http://www.physiotherapyphd.com Infra-Red Radiation: The infrared rays are electromagnetic waves with the wavelengths of 750 to 400000 nm and frequency 4 × 1014 Hz and 7.5 × 1011 Hz. It lies beyond boundary of visible light. Any hot body can produce infrared rays like the sun, electric bulb, coalContinueContinue reading “Infra-red radiation – Types and Effects”
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