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science

QuestionAnswer
Light is transmitted when it strikes a ________________ material transparent
Light is absorbed when it strikes an ________________ material opaque
Light is transmitted when it strikes a ________________ material but the object appears translucent,blurry
Refraction occurs when a wave changes speed moving through different mediums
___________________ - piece of information that is communicated using the senses Signal
___________________ - an unwanted modification of a signal Noise
Light waves stay inside an optical fiber because the fiber ___________________the light back into the core reflects
FM radio transmissions are affected by ___________________, ___________________, and ___________________ mountains, buildings, and bad weather
Signal noise ___________________the quality of a wave decreases
___________________signals can travel long distances in optical fibers, due to internal ___________________ Electronic, reflection
Signals are first ___________________, then ___________________, and finally ___________________ encoded, then transmitted, and finally decoded
___________________ cable can send signals long distances without degradation Fiber optic
___________________(protective exterior materials) causes light to reflect within fiber optic cables Cladding
All communication signals send ___________________ information
Analog signals ___________________continuously over time change
As electromagnetic waves travel through a medium they lose ___________________ energy
Examples of electromagnetic waves use to transmit signals ___________________waves, ___________________waves, and ___________________ Light waves, radio waves, microwaves
Example of a ___________________signal without ___________________ analog, noise
Digital signals do NOT continuously ___________________ change
___________________signals have values that change between ___________________values (0 and 1) Digital,two
Computers use ___________________numbers, such as on (1) and off (0) binary
___________________signals do not need to be as precise as analog signals because they only be read as 0 (pits) or a 1 (lands) Digital
___________________does not affect digital signals in the same way as analog Noise
CDs, ___________________, and ___________________are examples of ways to store, send, ore receive digital information DVDs, Computers
Created by: im him 67
 

 



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