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Explain basic principle of holography
Holography is a new method of producing a 3D image of a 3Dobject. An ordinary photograph is only a 2D image of a 3D object. The photographic ?eld is resistive only to amplitude variation of the electromagnetic waves and it is not sensitive to point variations. So this photo does not give the phase information of the waves. In 1948, Dennis Gabor introduced a new method to record both amplitude and phase variation of the electromagnetic waves scattered from the object. When it is reproduced, we get a 3D image of 3D object. Hologram is a recorded inference pattern obtained by the object waves and the coherent reference wave
In order to obtain p-type germanium it should be doped with a (A) Trivalent impurity. (B) Tetravalent impurity. (C) Pentavalent impurity. (D) Any of the above will d
If a negative charged particle enters a magnetic field perpendicularly,then it follows a circular path.In what directn does the particle move---in clockwise or anticlockwise? So
Q. What is the Newton meter? Answer:- A unit of energy is as well known as a Joule. When a force of 1 Newton is used on an object for a distance of 1 meter then 1 Joule of
We all know that some astronaut had landed in the moon to check out how''s going on the moon. But why only a few astronaut? People created the Apollo and they made it. They sent so
What do you mean by beats? Illustrate the importance of beats. What are applications of ‘Doppler Effect'?
Hydrogenation reactions are facilitated by the use of a transition metal catalyst such as Ni or Pt. Predict the signs of ΔH, ΔS and ΔG when hydrogen gas is adsorbed onto the surfac
The helicopter view in fig. p3.29
If W is atomic weight and N is the atomic number of an element, then: (1) Number of e -1 = W- N (2) Number of 0 n 1 = W- N (3) Number of 1 H 1 = W-N (4) Number of 0
Angle of Deviation: When a ray of light passes by a prism, It changes it's path inside the prism and forms an angle with the emergent ray. This angle is called as the angle of
as flux = E.A and flux density is equal to flux/A then why A/A cannot e cancelled ?
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