các bạn tải miễn phí ebook: The laser: The Solution to ManyProblems
The laser: The Solution to Many
Problems
Like most people, for many years I remained frightened of
the laser, perceiving it as a deadly device capable of
enormous destruction. I recall a scene in a James Bond
movie, Goldfinger, in which Bond, who was tied to a table,
was nearly sliced in half by a laser beam. Since then,
other films and television shows have fuelled my fear of
the laser by showing mad scientists who wanted to take
over the world threatening to use huge laser devices to
wipe out towns and strategic defence areas. Although the
laser does have tremendous potential for destruction, my
unreasonable fear of the laser is fading. In recent years,
scientists have found that the laser has a wide variety of
applications, making it one of the most important
inventions in the last quarter of a century for improving our
quality of life.
One important field in which the laser has many
applications is communications. Scientists have found that
the laser beam can transmit human voices; as a result,
telephone companies are now using laser light signals to
transmit telephone calls through extremely small cables
that are capable of carrying many more transmissions
<
các bạn download về để xem đầy đủ nhé
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The laser: The Solution to Many
Problems
Like most people, for many years I remained frightened of
the laser, perceiving it as a deadly device capable of
enormous destruction. I recall a scene in a James Bond
movie, Goldfinger, in which Bond, who was tied to a table,
was nearly sliced in half by a laser beam. Since then,
other films and television shows have fuelled my fear of
the laser by showing mad scientists who wanted to take
over the world threatening to use huge laser devices to
wipe out towns and strategic defence areas. Although the
laser does have tremendous potential for destruction, my
unreasonable fear of the laser is fading. In recent years,
scientists have found that the laser has a wide variety of
applications, making it one of the most important
inventions in the last quarter of a century for improving our
quality of life.
One important field in which the laser has many
applications is communications. Scientists have found that
the laser beam can transmit human voices; as a result,
telephone companies are now using laser light signals to
transmit telephone calls through extremely small cables
that are capable of carrying many more transmissions
<
các bạn download về để xem đầy đủ nhé
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