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Btec Applied Science Unit 1 Waves - Fibre Optics & Analogue Versus Digital Questions And Answers With Verified Solutions Already Passed!!!$14.49
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Btec Applied Science Unit 1 Waves -
Fibre Optics & Analogue Versus Digital
Questions And Answers With Verified
Solutions Already Passed!!!
what is an optical fibre? - ANSWER✔✔long thin strands of glass or plastic that
can carry light for long distances without allowing the light to fade out
what covers the fibre optic core? - ANSWER✔✔a cladding made of a lower
refractive index
what are fibre optics used for? - ANSWER✔✔they are used to transmit light in
communications and medical applications
how do fibre optics work? - ANSWER✔✔light enters the glass core and is total
internally reflected
>the data is encoded as a sequence of pulses of light from a laser and sent along a
fibre
>the signal can travel many km without a boost, unlike an electrical signal sent
through a copper wire.
what is multimode dispersion? - ANSWER✔✔multimode dispersion is where
pulses of light broaden out over time because pulses of light can take several
different paths
how is multimode dispersion overcome? - ANSWER✔✔single modal fibres with a
core diameter of only a few wavelengths are used, in this way light can only travel
in one path
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