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Arago spot (D.F.J. Arago)
A bright spot which appears in the shadow of a uniform disc being backlit through monochromatic light emanating from a point source.
Theory of bi prism
Regard as two Styrofoam cups. Each one is on the end of its own neutral slender glass rod which serves as a handle. One of the cups has a fixed amount of positive charge consistent
what do you mean by banking of roads?why is it done?a train has to negotiate a curve of radius 400m.by how must the outer rail is raised as compared with the inner rail for a speed
A bar magnet having of two equal and opposite magnetic pole separated by a small distance. Poles are not precisely at the last. The smallest distance among two poles is known as ef
What are the properties of ultrasonic waves? Properties of Ultrasonic Waves are as follows: a. Ultrasonic waves are acquiring frequencies higher than20 KHz and therefore th
What is meant by the term 'modulation'? Define with the help of a block diagram, how the process of modulation is carried out in radio broadcasts.
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Q. What are non-polar molecules? Give an example. i) A non-polar molecule is one in that the centre of gravity of the positive charges coincides with the centre of gravity of
Explain vectors Vectors : a quantity that has a size as well as direction is known a vector. So, for example, the wind blows with some speed and in some direction. So the win
What are the types of optical fibres? Types of Optical fibres: Optical fibres are categorized within three main types based onto: I. Material II. The number of modes a
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