Reading 7.3 – Using Light in Optical Fibers

The lamp has hundreds of thin plastic ____________ coming out of it. The ends of the fibers glow with a tiny light. These tiny strands are called optical fibers.

• figs

• fibers

• friends

• fires

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Optical fibers are used to make fun lamps, but they are also used in other ways to make your life easier. Every time you go on the Internet, you send and receive information using __________________ fibers.

• opera

• optics

• optical

• opal

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Optical fibers also make it possible for a __________ to get hundreds of channels.

• microwave

• television

• alarm clock

• pet

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Notice that you can see through the ____________ plastic.

• clear

• black

• card

• cone

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Optical ______ are used to make fun lamps, but they are also used in other ways to make your life easier.

• cases

• fibers

• habits

• hands

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____________ fibers also make it possible for a television to get hundreds of channels.

• Oboe

• Opal

• Opera

• Optical

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Optical fibers work because light is reflected and _____________ by materials in the fiber. Most optical fibers are made of glass surrounded by other materials.

• tan

• trained

• transmitted

• tainted

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When doctors do surgery, they must be able to see inside a patient’s body. Usually, they have to cut into skin. By using _______________ fibers, doctors can make very tiny cuts and leave scars that are almost invisible.

• opera

• optical

• optic

• oboe

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Optical fibers may someday provide sunlight for people with no windows, even if they are ________________.

• in a tub

• underground

• outside

• in a mirror

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To send light down a cable,optical fibers rely on reflecting and transmitting _____________.

• light

• sound

• movement

• odors

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