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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.
why we take large radius of curvature of lens
Write a short note on different kinds of capacitors. Applying Gauss's law derive the mathematical expression for electric intensity due to a charged conducting spherical shall
Q. What are antireflection films and interference filters? Ans. Anti reflecting Films: When a beam of light travels normally from a medium of refractive index µ2 to a me
A magnet is used to collect some spilled paper clips. What is the magnetic pole at the end of the paper clip that is indicated in the figure
Principle of uniqueness of freefall: The idea inside general relativity that the worldline of a freefalling body is independent of its, structure, composition or state. This p
AC Input Resistance in Common Emitter Configuration Ratio of change in base emitter voltage ( ? V BE ) to the resulting change in base current ( ? I B ) at cons
AVERAGE ACCELERATION: The total change in velocity of a body separated by total time taken is known as average acceleration. It is denoted by a ? av or .
Q. Illustrate what two properties of electromagnetic waves are used to attach info to radio signals? Answer:- By changing the amplitude of a radio wave you can encode info
what are characteristics of resistances
Can the whole charge of a body is transfer to another body
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