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What are the disadvantages of polymer fibers optics?
The ends of polymer fibers can't operate along with high temperatures. Illuminators or light sources are required with a screen temperature lower than 60ºC. Although several polymers can work with 100ºC and over, this fact is that such constant high temperatures cause changes on the polymer chains, particularly at the common end. It results on a hardening and blooming or blushing of the material, causing a deterioration of that system. The utilization of very powerful and hot illuminators along with polymer fibers, mainly cases there is sheer madness.
Though, there is very little data on polymer aging, several manufacturers offer a 20-year guarantee upon their systems that is more than sufficient in most instances.
Radius of curvature is a delicate issue with large diameter solid core fibers and it has to be handled with great care in order not to change the internal architecture of the fibers that will result in losses. Unsheathed or bare fibers are very delicate and the external cladding becomes quickly damaged because of abrasions and scratches.
Q. When there is no feedback, the gain of the amplifier is 100. If 5% of the output voltage is fed back into the input through a negative network, find the voltage gain after feedb
Objective After studying this unit, you should be able to: 1. explain the importance of international trade; 2. discuss why a fm is motivated to export; 3. identify
a sphere is at rest on a wall at a angle of 3,4(slpoe) to the left. it also rest against a vertical wall. we are to find the magnitude of the resultant force at the vertical wall.
A scooterist is racing at a speed of 72 km per hour. If the radius of the wheel is 20 cm, find the angular speed of the wheels. Ans) 72kmph=20m/s 20cm=0.2m; v=rw w=v/r w=20/0
Ferromagnetic Substance: A substance which behaves as a magnet in presence of a strong magnetic field is known as ferromagnetic substance. E.g. Iron, Nickel
A coil havingof a resistance of 100 and an inductance of 200mH. If an alternating voltage, v, givenby v=200sin500t volts is applied across the coil, measure (a) The circuit
What is a hypothesis for a Hooke''s Law experiment which was completed with a single, series and parallel spring arrangement?
When Temperature increases,intensity increases,but in some time intensity decreases,Why?
mass of body= 4 kg is dropped form height= 45 m Calculate the kinetic energy just before hitting the ground
Sodium iodide crystal (NaI) It scintillate with good efficiency when gamma ray is absorbed, these crystals where attached directly to the PTM to detect a weak flashes of light
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