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POPULATION INVERSION and LUMINOUS FLUX:
POPULATION INVERSION: The process in which number of electrons (N ) in a higher2 energy state called metastable state of an active medium is increased to a value greater than the number (N ) in the ground state (i.e. N > N ) is called population inversion.
LUMINOUS FLUX : The amount of radiant (light) energy following from a source of light per unit time is called luminous flux or light flux (Φ) . It is measured in lumens.
LUMINOUS INTENSITY : Luminous intensity of a point source of light is defined as the luminous flux emitted from it per unit solid angle.
It is otherwise called Illuminating power (I). It is measured in candela (cd).
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Define the interplanar spacing in miller indices. Interplanar spacing d in a cubic lattice Interplanar spacing into a cubic crystal is specified by d = a/(√(h2 + k2 + l
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Q. What are secondary cells? Give an example? i) They are rechargeable. ii) The chemical reactions which take place in secondary cells are reversible. iii) The active mat
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The boom DF and the column DE have a uniform weight of P55 N/m and the chain and load at F is P56 kN. Determine the Shear Force in kN rounded to 1 DP and the Bending Moment in kN.
Basic principles of spectrophotometry: An absorbance spectrophotometer is an instrument that measures the fraction of the incident light transmitted through a solution
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