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Properties of light:
The wavefronts can be of different shapes depending on the size and shape of light source and the distance from it. Huygens' principle states that every point on a wavefront behaves as the source of small secondary wavelets which spread out in all directions with a velocity equal to the velocity of light. The new wavefront is then found by constructing a surface of envelope tangential to the secondary wavelets.
Applying Huygens' principle, the phenomenon of reflection and refraction could be explained. The velocity of water waves depend on the depth of the water. The principle of superposition of waves states that when two or more waves travel through the same portion of a medium simultaneously, the resultant displacement at any point is the vector sum of the displacements due to the individual waves.
Describe power of a lens. Write its SI unit. What do you mean by linear magnification produced by a lens in a direction perpendicular to its axis? Write down the mathematical expre
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The line integral of the magnetic flux about a closed curve is proportional to the algebraic total of electric currents passing through that closed curve; or, in differential form,
The lagging of an effect behind its cause; especially the phenomenon in which the magnetic induction of a ferromagnetic material lags behind the changing magnetic field.
(i) Meter : The presently accepted definition of meter is the length of path travelled by light in space in 1/299,792,458th second. (ii) Kilogram : Kilogram is the fundamental
In a perfect instrument the zeros of the major scale and circular scale coincides with each other, in that situation screw gauge has zero-error, or else the measurement device is s
Write any four characteristics of electromagnetic waves. Give two uses each of 1. Radio-waves 2. Micro-waves.
The fraction of vacancy sites in a metal is 1X10 -10 at 500 0 C. What will be the fraction of vacancy sites at double the temperature?
Can you write me a paper
Explain the principle of operation of any one type of MOSFET. Operating Principle of N-channel Enhancement MOSFET Operating principle of N channel Enhancement MOSFET i
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