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What is hologram?
Holography
When an entity is photographed by a camera a two dimensional image of three dimensional objects is obtained. A three dimensional image of an object is able to be formed by holography.
In normal photography the amplitude of the light wave is recorded on the photographic film. In holography both the phase as well as amplitude of the light waves is recorded on the film. The resultant photograph is called hologram.
A plane diffraction grating of width 2.5cm has 1500 rulings. Monochromatic light of wave length 5893A 0 is incident normally on it. Determine the angle at which second order princ
Which Is Best Tan A position Or Tan B Position.?
Three similar coils, each having a resistance of 8 and an inductive reactance of 8 are connected (a) in star and (b) in delta, across a 415V, 3-phase supply. Measure for
What do you mean by spontaneous process? Give examples. What is path and state functions? Give examples.
Laws of limiting friction
Explain Constant voltage system Constant voltage system : In this process voltage is kept constant but results in very huge charging current in the starting when the back emf
When the attacking species during the addition reaction is Nucleophilic, it is nucleophilic addition reaction. Ex; Acetaldehyde cynohydrin
De?ne reduction potential and oxidation potential. Reduction potential of a metal is the measure of tendency of a metallic electrode to gain electrons when it is in contact wit
What do you mean by transformer ratio? A current of 2A is passed through a coil of 1000 turns to produce a flux of 0.5µwb. Determine the self inductance of the coil.
Convex lens can be used as a magnifying glass. When an object that is 15.0 cm from the lens has an image that is exactly 55 times the size of the object, what is the focal leng
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