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Fermat's principle; principle of least time (P. de Fermat):
The principle put by P. de Fermat, which states the path taken through a ray of light among any two points into a system is always the path which takes the least time.
What are the branches of physics? The basic branches of physics are a) Classical mechanics b) Electromagnetism (including optics), c) Relativity, d) Thermodynamics,
Unit Vectors A unit vector is a vector of unit length. A easy animation of unit vectors and vector addition. A unit vector is a vector of length 1, sometimes also called a dir
A 150-kg roller-coaster car climbs to the top of a 91-m-high hill. How much work is completed against gravity as the car is lifted to the top of the hill?
a car with an initial speed of 24.5 km/hr accelerates at a uniform rate of 0.98 m/s^2 for 5.6sec. find the final speed and displacement of the car during this time.
Carbon: Atomic number 6 Symbol C Atomic weight 12.011 Discovery Carbon exists fre
A particle with charge q and mass m is shot with K.E ''k'' into the region between two plates.If magnetic field between plates is B.How large B must be if the particle is to miss c
Q. What is the dissimilarity between Free Electron Theory and Band Theory of solids? Answer:- The Free Electron Theory This theory notifies that metals conduct electric
Explain the concept of coherence.Discuss temporal coherence and spatial coherence.
Regard as two charged particles. At a given separation each one particle exerts a force of 12 N on the other. What force does every one exert on the other after someone moves the p
Question As-per to the law of reflection the angle of reflection is equal to the angle of incidence. An angle is at all times an angular separation between two planes a direct
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