Qeustion:
It is possible to communicate a simple message using light. Semaphore was the method used by ships.
Describe an example of light communication, give advantages and disadvantages.
2006-10-08 04:48:05 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
you are using light to communicate right now - the pixels on your commputer screan contain light of various wavelengths.
2006-10-11 03:27:16 · answer #1 · answered by AMY 2 · 0⤊ 0⤋
The reflected sun has been used for communications for thousands of years (heliograph). Alexander Graham Bell. Check the first link below for more. Also the second link provides these bit of information.
Brief History
Why Optical Communications?
Why through-the-air communications?
What are some of the limitations of through-the-air communications?
How can these light-beam techniques be used?
Possible uses for optical through-the-air communications
2006-10-12 03:28:08 · answer #2 · answered by wandera1970 6 · 0⤊ 0⤋
What about morse code? That is a series of long and short blinks of light to convey a message. Advantages that you can send a message quickly over a long distance but disadvantages may be if it is really sunny or foggy!
2006-10-08 04:51:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The answer which included optical fibres was great, but with simple messages consider:
Indicators on a car.
Lighting on an aircraft runway
Traffic lights
Advantages: clear, crosses languages and cultures.
Disadvantages: requires electricity (doesn't work otherwise). Line of sight only. Can be blocked by weather conditions.
2006-10-08 06:00:51 · answer #4 · answered by 13caesars 4 · 0⤊ 0⤋
There are many examples.
Ships have red light on their port side and green on their starboard to communicate to other ships which side to pass at night.
Police cars have flashing blue lights to warn of their approach.
Beacons were used to pass messages of invasion quickly across country.
Fibre optic cables carry complicated light messages to conects phone services and computers
Good thing. It's fast.
Bad things, it's line of sight so can be blocked by trees, hills etc.
Fog, cloud rain etc. can block it unexpectedly.
There aren't too many disadvantages of fibre optics. They can be difficult to join well but that's about it
2006-10-08 04:59:45 · answer #5 · answered by Rick 3 · 0⤊ 0⤋
yes by using optical fibers.the advantage of this is that millions of messages can be sent in a small amt of time.
An optical fibre is a thin, transparent fiber, usually made of glass or plastic, for transmitting light. Fiber optics is the branch of applied science and engineering concerned with such optical fibers.
Optical fibers are commonly used in telecommunication systems, as well as in illumination, sensors, and imaging optics.
An optical fiber (American spelling) or fibre (British spelling) is a cylindrical dielectric waveguide that transmits light along its axis, by the process of total internal reflection. The fiber consists of a denser core surrounded by a cladding layer. To confine the optical signal in the core, the refractive index of the core must be greater than that of the cladding. The boundary between the core and cladding may either be abrupt, in step-index fiber, or gradual, in graded-index fiber.
2006-10-08 05:01:13 · answer #6 · answered by rockinsaint 2 · 1⤊ 0⤋
Yes of course. The light it's just a wave and it can communicate messages. For example, the infrared devices.
2006-10-08 05:00:39 · answer #7 · answered by Ντάνιελ 3 · 0⤊ 0⤋
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2016-11-27 00:51:10 · answer #8 · answered by Anonymous · 0⤊ 0⤋
The remote on my television.
The advantage is that I do not have to get up.
The disadvantage is that my wife pinches it to watch soppy programmes.
Mirrors using the sun rather than light sources have been used - the Heliograph - but are as unreliable as the weather!
RoyS
2006-10-08 19:02:56 · answer #9 · answered by Anonymous · 0⤊ 0⤋
One example of simple light communication would be traffic signals. Advantage is that it makes traffic smoother. Disadvantage: when it malfunctions.
2006-10-08 05:00:12 · answer #10 · answered by netwalker01 3 · 0⤊ 0⤋
you can send messages using the suns reflection in a mirror. Or ships used to send messages to other ships using blinking lights.
2006-10-08 05:03:47 · answer #11 · answered by derek 3 · 0⤊ 0⤋