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Q. What is Fresnel diffraction?
a) The source as well as the screen are at finite distances from the obstacle producing diffraction.
b) The wave front suffer diffraction is either spherical or cylindrical.
c) The diffracted rays can't be brought to focus with the help of a convex lens.
Equatorial Line and Neutral point: Equatorial Line: The imaginary line joining the centre of mass and perpendicular to the line joining the poles of a bar magnet is called th
It has large energy gap 3.0ev and is regarded as high temperature semiconductor. It is extremely refectory subliming in the region of 2800 0 C. Because of large band gap it is hope
Explain Scalars and Vectors This is one of the harder ideas to get used to when you start learning physics. The trick is to see that there is one basic difference between a sca
Motion of a swing Periodic Motion : Motion that repeats itself in equal intervals of time is known as periodic motion.
Current time base generator
Magnification is the ratio of size of image to the size of object. hence it is a dimensionless constant. It has no units. 1/m is not its unit.(1/m is the unit of power=DIOPTRE)
Colour code of resistors: The current method of colour code marking of resistors is the Band System. Close to one end of the resistor are four coloured bands (there may
Explain displacement x(t) is known as displacement and it denotes the position of a body at time. If the displacement is positive then that body is to the right of the chosen
Q. Explain why does heated air expand? Answer:- Temperature is habitually defined as the average thermal energy of the substance at hand. Therefore the hotter a substance
Define one newton
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