Fiber optics use thin strands of glass to transmit digital information over long distances using total internal reflection. Fiber optic cables are about the diameter of a human hair and carry light signals generated by a transmitter that turns the light on and off in a specific sequence. This light signal is transmitted through the fiber using total internal reflection and emerges from the cable to be interpreted by a receiver.

1. How Fiber optics Work
・5 Key word
1,fiber-optic cables
2,Fiber optics
3,total internal reflection
4,mode fibers
5,Transmitter

2. < 3 sentences >
1・Fiber optics (optical fibers) are long,
thin strands of very pure glass about
the diameter of a human hair. that
carry digital information over long
distances.
2・The transmitter is like the sailor on
the deck of the sending ship. It
receives and directs the optical device
to turn the light "on" and "off" in the

3. correct sequence, thereby
generating a light signal
3・Suppose youwant to shine a
flashlight beam down a long,
straight hallway.

4. 3. Why are these sentences
important?
1, Because,the cable is using to TV.
They are also used is imageing and
mechanicsl engineering inspection.
And It is very thin .So, It is to be
useful various field.

5. 2,Because ,It is very convenient.
The cable is that our life is very
abundant.The cable is using to
flash,and it is fast to cannection
Internet.

6. 3,The flashlight is using to flash to
connect.It is can cannect to Interner
by using various techniqul.
The function is innovative.