How Is It Done?

Fülszöveg

HOW IS IT DONE?
An entertaining and informative look at man's ingeniousness and inventiveness which explains how things are discovered, how they are made and how they work. How is it Done? explains how tunnels can be constructed underwater, shows what Pasteur and Einstein discovered, describes how a cordless telephone works, and reveals how a magician saws a lady in half - plus the answers to hundreds of other puzzling questions.
HOW DOES IT WORK? How instant pictures are sent by telephone; how lasers make music.
DECEPTION AND DETECTION 'Truth drugs'; secret codes and genetic fingerprinting.
FOOD AND DRINK
How food is irradiated; how instant
coffee is produced.
EXPLORING THE UNIVERSE How photographs are sent by satellite; how black holes are discovered.
MIRACLES OF SCIENCE How clones are made; reconstructing prehistoric animals.
INGENIOUS SOLUTIONS Turning oil into nylon and refuse into fuel.
WITH SPECIAL FEATURES ON PEOPLE WHO CHANGED THE FACE OF THE WORLD
Neon:... Tovább

Fülszöveg

HOW IS IT DONE?
An entertaining and informative look at man's ingeniousness and inventiveness which explains how things are discovered, how they are made and how they work. How is it Done? explains how tunnels can be constructed underwater, shows what Pasteur and Einstein discovered, describes how a cordless telephone works, and reveals how a magician saws a lady in half - plus the answers to hundreds of other puzzling questions.
HOW DOES IT WORK? How instant pictures are sent by telephone; how lasers make music.
DECEPTION AND DETECTION 'Truth drugs'; secret codes and genetic fingerprinting.
FOOD AND DRINK
How food is irradiated; how instant
coffee is produced.
EXPLORING THE UNIVERSE How photographs are sent by satellite; how black holes are discovered.
MIRACLES OF SCIENCE How clones are made; reconstructing prehistoric animals.
INGENIOUS SOLUTIONS Turning oil into nylon and refuse into fuel.
WITH SPECIAL FEATURES ON PEOPLE WHO CHANGED THE FACE OF THE WORLD
Neon: creating pictures and words with light
Neon lights create gaudy pictures and spell out brand names on advertisements the world over.
Unlike the traditional electric light bulb, neon lights in the form of thin tubes can easily be shaped into lettering and other intricate outlines.
To produce their distinctive light, they exploit what is called 'electric discharge through gases'. Ordinarily, gases do not easily conduct electricity - they are good insulators. They can, however, be made to conduct electricity if their pressure is lowered and a high voltage is applied.
In the late 19th and early 20th centuries, scientists investigating electric discharge through the rare gas neon at low pressures, first obseived the striking red-orange glow the gas gives out.
To create neon light, electricity is applied to the ends of a glass tube filled with neon. Atomic particles called electrons stream from one end of the tube to the other, and on their way they collide with atoms of neon. As a result of the
Neon at night Dominating the kaleidoscope of neon in Las Vegas is the Pioneer Club's neonised cowboy with his waggling cigarette (left). The figure was created in 1951. In Hong Kong, too, neon lights bustle in the air (above). Some of them, such as this dragon figure, are a glassbencler's nightmare. Vissza