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Q. What is a frame of reference?
A system of co-ordinate axes which describe the position of a particle in two or three dimensional space is called a frame of reference.
why do we need degenerate semiconductor to fabricate a laser diode?
Infra-Red (IR) Detectors: An IR detector has an impedance of Z= (400+j200) ? . During design tests the detector current is measured as 4 µA. What is the output volta
Short- distance radiotherapy or brachytherapy: The advantage: it gives a very large dose to the tumor with a minimum radiation to the surrounding normal tissue. Disadva
The work done by a friction force is: a) Always positive b) Always negative c) Always zero d) Either positive or negative depending upon the situation. An
When a system returns back to its initial state after passing by dissimilar phase, the phenomena is said to be a cyclic process. In this process as ΔU = 0. From first law of the
Interaction of X-rays With Matter Elaborating the 3 principle modes through which X-rays interact along with matter. Photoelectric effect, Pair Production Compton Effect,. Sel
A ray of light in air is occurrence upon a flat piece of glass. How acts the path that the light travels along when it is in the glass compare with the path in the air?
What do you mean by nuclear fission? Illustrate liquid drop model of nuclear fission? Difference between nuclear fission and nuclear fusion. State the properties of α, β, γ ra
Mechanical energy E of particle, system or object is explained as the sum of kinetic energy K and potential energy U, i.e. E = K + U. It is a scalar quantity having dimensions [ML
2 cars, 1 and 2 starting from rest are moving with speeds v1 and v2 m/s(v1>v2). car 2 is ahead of car1 by ''s'' metres when the driver of car 1 sees car 2. what minimum retardation
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