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Bohr given a model for hydrogen molecule which is also applicable for some lighter atoms in which a one electron revolves around a stationary nucleus of positive charge Ze (known as hydrogen like atom)
Bohr's model is based on the following postulates.
(i) The electron can revolve only in particular discrete non-radiating orbits, named stationary orbits, for which total angular momentum of the revolving electrons is an integral multiple of
Q. The minimum wavelength of X-rays produced in a Coolidge tube is 0.05 nm. Find the operating voltage of the Coolidge tube. λmin = 12400 A 0 / V = 0.5 X 10 -10 m Theref
Stern-Gerlach experiment (O. Stern, W. Gerlach; 1922): An experiment which demonstrates the features of spin (intrinsic angular momentum) as a different entity in spite of orb
Consider the 4-f system below where an object is placed at the input plane and is illuminated by a plane wave The object to the right is placed in the input plane where b
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 medi
what is torsion of cylinder ?
Two tiny objects with equal charges of 71.0 µC are placed at two corners of a square with sides of 0.340 m, as shown. How far above and to the left of the corner of the square labe
An alternating voltage v=250sin800t volts is applied across a series circuit having a 30 resistor and 50µF capacitor. Calculate (a) the circuit impedance, (b) the current ?
A bottle and marble Pour some sand into a wide mouthed bottle. Place a piece of cardboard about 5 cm square over the mouth of the bottle. Set the marble on the cardboard and th
The simple equation E = mc² is not usually applicable to all these types of mass and energy, except in the special case that the total additive momentum is zero for the system unde
An elementary particle is: (1)An element present in a compound (2)An atom present in an element (3)A sub-atomic particle (4)A fragment of an atom Ans: (3)A s
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