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Refraction law:
For a wavefront travelling by a boundary among two media, the first along a refractive index of n1, and the other with one of n, the angle of incidence theta is associated to the angle of refraction phi by
n1 sin theta = n2 sin phi.
Constancy principle (A. Einstein): One of the postulates of A. Einstein's special theory of relativity, that puts forth that the speed of light in vacuum is calculated as the
Consider a circular loop in a magnetic field. The loop is made of elastic material with spring constant k. It carries a current I and has radius R when unstretched. We immerse it i
state and explain pauli''s exclusion principle
The conductivity of copper is less than that of silver by (A) 5 - 10 %. (B) 50 - 60 %. (C) 80 - 90 %. (D) 20 - 30 %. Ans: The conductivity of copper
Consider an electron in a simple one-dimensional periodic potential. The energy of the electron will vary periodically due to the influence of the periodic potential, and can be de
please explain projectile motion
The earth’s magnetic field: The earth acts as a magnet and the lines of force produced by it follow the pattern shown in the diagram below. If the Earth were completely symm
The voltage drops across two components when connected in series across an a.c. supply are v1 =150sin 314.2t and v2 =90sin(314.2t -∏/5) volts respectively. Determine (a) the v
A modern turbofan engine in a commercial jet takes in air, part of which passes through the compressors, combustion chambers, and turbine, and the rest of which bypasses the compre
The heat-rejection system for a condenser of a steam power plant is to be designed for minimum first plus pumping cost. The heat-rejection rate from the condenser is 14MW. The foll
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