EXERCISE 2
Words and expressions to be remembered:
Data transport – передача данных
spark – вспышка, разряд
coherer – радио, когерер
contentious – спорный
hindsight – ретроспектива, взгляд в прошлое
bandwidth – полоса пропускания
to publicize – объявлять, предавать гласности
lightning detector – обнаружитель молнии
amplitude-modulated - aмплитудно-модулированный
to fluctuate – колебаться
full fluctuation – полное колебание
wire - провод
frequency-частота
time spread - период
non-ionizing radiation – неионизирующее излучение
EXERCISE 3
Answer questions about the text.
1.Who discovered the existence of radio waves?
2.What is a nature of a radio wave?
3.How does data transportation take place?
4.What definition of a radio wave can you give?
5.What specific features do radio waves have?
6. How are the wave bands usually classified?
7.What is a wave band?
8.Where are radio waves used?
EXERCISE 3
In the picture you can see the way that original sound passes before it becomes reproduced sound. Describe this way in your own words.
Fig.1 Electromagnetic spectrum and diagram of radio transmission of an audio signal.
EXERCISE 4
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