Question

You may never want to fly kites to keep away evil spirits, as the Chinese

have done for centuries, or to make rain, as the Tibetans did, but some

more modern and Western uses may tempt you to try experimenting

yourself along similar lines. The kite has been claimed as the invention of

5th century BC Chinese philosophers Mozi and Lu Ban. By 549 AD, paper

kites were certainly being flown, as it was recorded that in that year a paper

kite was used as a message for a rescue mission. The most widespread

use of kites in modern times has been for meteorological investigations.

Everybody knows about how Benjamin Franklin, the great American

scholar and statesman, sent a kite, up in 1752 during a thunderstorm to

prove that lightning was caused by electricity. He produced sparks at

ground level from a key hung on the wet line as the current flowed down it.

(Do not under any circumstances think of trying this yourself). A second

investigator repeated Franklin’s experiment shortly afterwards and was

killed. By sending up instruments on kites, it has been possible to make

readings of air pressure, temperature, speed, direction and humidity.

Although thermometers had been sent up long before, it was not until 1894

that a self-reading thermometer—a thermograph—was sent up by a kite.

The army, navy and air force have used kites in various ways for decades.

Another Korean version of the invention of the kite tells how a general used

one to carry a line across a stream. This line then formed the basis of a

bridge. Lines are still occasionally flown from point to point in this way using

kites. At sea, kites have often been used to carry a line to distressed ships

in rough weather. Kites—especially box and bow kites have been used as

gunnery targets. They are easy to make and cheap to use and will stand

quite a lot of punishment before they cease to fly. Apart from their use as

targets, kites have been used by the army to fly flags, for aerial

photography over enemy trenches, for suspending flares over targets

during night-fighting, for carrying men over enemy lines, for dragging

torpedos to a target area etc.

They have been used by both military and civil authorities for raising,

transmitting and receiving aerials to obtain improved wireless reception. As

a matter of fact, the first long distance short wave transmission of all made​

Answer 1

Answer:

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