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Michelson-Morley experiment (A.A. Michelson, E.W. Morley; 1887)
Probably the most popular null-experiment of all time, designed to check the presence of the proposed "lumeniferous aether" by which light waves were thought to propagate. As the Earth moves through this aether, a lightbeam fired into the Earth's direction of motion would lag behind one fired sideways, where no aether influenced would be exist. This difference could be detected along the use of an interferometer.
The experiment illustrated absolutely no aether shift whatsoever, where one must have been quite detectable. Therefore the aether concept was discredited as was the idea that one computed the velocity of light as being inserted vectorially to the velocity of the emitter.
In an ideal transformer , the no. of turns in primary & secondary are 200 & 1000 respectively .If power input to primary is 10kW at 200V.Calculate i)output voltage ii)current in
Electrical measuring instruments: Quantities of electrical current, voltage and resistance are measured using instruments called meters. Until the advent of electronic displays
Q. What is cut-off or stopping potential? The minimum negative (retarding) potential specified to the anode for which the photo electric current becomes zero is called the cut
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What are "Overtones" and "Harmonics" ? How are they build in an open pipe? Derive the mathematical equations for the frequencies of the harmonics produced in an open pipe.
Construction and working of michelson''s interferometer in detail
A thin uniform rectangular sign hangs vertically above the door of a shop. The sign is hinged to a stationary horizontal rod along its top edge. The mass of the sign is 2.40 kg and
(i) The procedure of ejection of electrons from a metal surface by the application of heat is known as thermionic emission and emitted electrons are known as thermions and current
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