disadvantages of fiber optics -
Disadvantages of Fiber Optics
- Installation/maintenance
- Unidirectional
- Cost
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- light source is led light-emitting diode or a laser- leds are cheaper however not as precise unfocused limited to short-distance use- lasers is
applications of fiber optics - backbone networks because of wide bandwidth and cost effectiveness- cable tv- lans- 100base-fx fast
explain about atomsatoms - having of a nucleus central core and orbiting electrons nucleus have protons particles and neutrons neutral
q advantages of fiber optics- higher bandwidth in comparison to twisted-pair and coaxial cable is not limited by medium but by equipment used to
disadvantages of fiber optics - installationmaintenance- unidirectional-
radio waves - frequency ranges 3 khz to 1 ghz- omni directional- susceptible to interference by other antennas utilizing same frequency or band-
q show the properties of microwavesmicrowaves - frequencies among 1 and 300 ghz- unidirectional- narrow focus requires sending as well as receiving
q microwave applications- unicasting - one-to-one communication among sender and receiver- cellular phones- satellite networks- wireless
q use of infrared- frequencies among 300 ghz and 400 thz- short-range communication- high frequencies cant penetrate walls- necessitate line-of-sight
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