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The waves which do not needs medium for their propagation are known as non- mechanical or electromagnetic waves.
Examples : Light, heat (Infrared), radio waves, gamma- rays, X-rays etc.
Figure shows the frequency spectrum of a signal at 1184kHz displayed by a high-speed virtual DSO. Determine (a) The harmonic relationship among the signals marked 'o' and 'x',
What is the difference between a lens and a mirror? A mirror is a reflective surface. Light passes by the glass and hits the silver backing, reflecting off of it. (The angle of
Q. Tritium has a half life period of 12.5 years. What fraction of the sample will be left over after 25 years? HLP = 12.5 years Number of HLPs in 25 years = 25 / 12.5 =2
Unit vector which is perpendicular to the resultant of 2i+3j+5k and -i+2j+7k ; and passes by (1,2,4)
Q. What is artificial radioactivity? The phenomenon by which still light elements are made radioactive by artificial or induced methods is called artificial radioactivity. α
Can light is made to move or change along a side emitting optics? Along with roped or braided multicore fiber and a particular process at the common end optics can be made to c
A block of metal which weighs 60 newtons in air and 40 newtons under water has a density, in kilograms per meter cubed, of: a) 1000 b) 3000 c) 5000 d) 7000
An air stream is saturated with a vapor (B) at 130°F and 1 atm pressure. It is cooled down to 80°F where some of the B is condensed and separated from the vapor stream. The remai
How does a color changes works in glass, glass segments or a polymer material? This consists usually of a small, geared motor with a disc. It can be made of glass, a polymer ma
MANUFACTURING: Two processes are used manufacturing. Coated film: A mixture of carbon, filler and binder is coated on a ring of insulating material. The surface of the film is
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