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population inversion The process in which the number of electrons (N 2 ) in a higher energy state called ‘metastable state of an active medium is increased to a value greate
What are basic attenuation mechanisms in a fibre? The fundamental attenuation mechanisms into a fibre are as follows: a. Absorption b. Scattering (Mie and Rayleigh scatte
A solid cylinder of radius 12.1cm and mass 20.2kg starts from rest and rolls without slipping a distance of 6.14m down the house roof that is inclined at 25.3° relative to the hori
derive an expression for the total cross section for the scattering of light by a polorisable molecule in term of the incedent wave length.
The radioisotope 222 84 Po undergoes alpha decay to form an isotope of lead (lead has atomic number 82). Verify what the mass number of that isotope must be by writing a nuc
What is the ratio of mass of an electron to the mass of a proton: (1) 1 : 2 (2) 1 : 1 (3) 1 : 1837 (4) 1 : 3 Ans: 1: 1837
Q. Why does the sky appear blue in colour? As-per to the Rayleigh's scattering law the shorter wavelengths are scattered much more than the longer wavelengths. The blue look o
Q. State the law of conservation of electric charges? The entirety charge in an isolated system always remains constant. For instance Uranium ( 92 U 238 ) can decay by emittin
PROJECTILE: "When a body is thrown upward making a particular angle 'Q' with the horizontal and moves freely under the action of gravity, it is known as a projectile". EXAMP
Explanation construction and working of Nicol prism?
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