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What is a fiber optic?
It is long lenses. A cylinder or rod of transparent material forming a core surrounded with an external cladding by a slightly dissimilar material. Light, while entering the fiber, rebound on the outer cladding in direction of core.
This way the light by the fiber in bounds or steps, till it exits at the other end.
Q. What is fluorescence? When an atomic or else molecular system is excited into higher energy state by absorption of energy it returns back to lower energy state in a time les
An egg beater Study an egg beater, hand drill or some other device in which an enhance of speed is obtained by means of gears.
Can you give the S.I unit of electric displacement vector?
Wave-particle duality: The principle of quantum mechanics that implies that light (and, indeed, all other subatomic particles) sometimes work as a wave, and sometime like a pa
Explain internal or external forces Forces can be internal or external. For instance the mutual attraction of atoms within a block of wood are known as internal forces. Somethi
Field system: The object of the field system is to make a uniform magnetic field, within which the armature rotates. It consists of four parts- yoke, pole core, pole shoe and fiel
why newtons 2nd law is called the real law of motion?
left-hand rule: It is the opposite-chirality version of the right-hand rule.
Q. Why X-rays are not used in microscopes? 1) The wavelength of X-rays is slighter than that of the visible light. 2) X-rays can't be focussed as visible radiations are foc
Necessity Of A Starter For D.C Motors When motor is at rest, then N=0 and due to Eb is directly proportional to N, so At begin E b = zero Thus armature current at t
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