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Q. State Huygen's principle.
Huygen's principle:
(a) Every point on a specified wave front may be considered as a source of secondary wavelets which spread out with the speed of light in that medium and
(b) The new wave front is the presumptuous envelope of the secondary wavelets at that instant.
Q. Define: the temperature coefficient of resistance. The ratio of raise in resistance per degree rise in temperature to its resistance at 0 o C is called as temperature coeff
Magnification is the ratio of size of image to the size of object. hence it is a dimensionless constant. It has no units. 1/m is not its unit.(1/m is the unit of power=DIOPTRE)
What do you mean by spontaneous process? Give examples. What is path and state functions? Give examples.
Single crystal growth. The single crystals are grown either by the Czochralski (CZ) method or by the Float Zone (FZ) method. It having of a furnace with a gradient in temperatu
Optical interference process is broadly divided into two categories namely (i) division of wave front (ii) division of amplitude. Give one example for each category of interference
a) Here temperature difference of junction is used to produce thermo e.m.f. and vice-versa. b) This effect produced when junctions of a thermocouple are kept at dissimilar tempe
what exactly is pulse height analysis
Electromagnetic waves are transverse waves; that means magnetic vector and electric vector, propagation vector are perpendicular to each other. Prove the statement mathematically.
What is the specific resistance of material of a conductor. What do you mean by thermoelectric refrigerators?
Is a sewing needle magnetic or non magnetic? Answer:- When you purchase it in the store it isn't magnetized but if you rub it with a magnet it becomes magnetic.
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