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How is absorption occurred in fibre material?
Absorption is associated to the fibre material. It is caused by three diverse mechanisms, which are:
a. Absorption by atomic defects within the medium as glass or plastic,
b. Extrinsic absorption through impurity atoms into the host material and
c. Intrinsic absorption through the fundamental constituent atoms of the fibre material.
The SI unit of pressure is the: a) Torr b) Dyne per centimeter squared c) Atmosphere d) Pascal Ans: The SI unit of pressure is the Pascal.
is it possible for an element to have different types of atoms/Explain/
Conductor: Conductors are those substances which permit electric current to passes easily by them. e.g. Metal, impure, water etc.
Write down the condition for the construction of good auditoria. Illustrate the reflection of waves at closed and open ends.
Rydberg formula (Rydberg): A formula which define all of the characteristics of hydrogen's spectrum, comprising the Lyman, Paschen, Balmer, Pfund series and Brackett,. For
Q. Name the types of photoelectric cells? The photo electric cells are of three kinds: A) Photo emissive cell B) Photo voltaic cell and C) Photo conductive cell.
differentiate between direct and indirect band gaps
State two conditions which must be satisfied in order to apply tangent law in magnetism
Q State Lenz's law. Lenz's law declares that the induced current produced in a circuit always flows in such a direction that it opposes the change or cause that produces it.
Archimedes' principle A body which is submerged into a fluid is buoyed up through a force equal in magnitude to the weight of the fluid which is displaced, and directed upward
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