A. Checking your understanding
I. Give answers to the following questions:
1) What are basic and significant matters in physics to study?
2) What are the vital differences between sound waves and light waves?
3) Are there some other types of light? Can you name them?
4) What is peculiar about different animals` ability to view some
types of light? Give examples.
5) What happens when sound waves hit materials?
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II. There are several definitions in the text. What are they? Complete the
sentences with appropriate words (in some sentences you need more than 1
word).
1) … - a specific area of study in the field of science that focuses on the
makeup and properties of both energy and matter, as well as how the
two interact together.
2) … … - both forms of energy that travel in the form of waves.
3) … … - are only capable of hearing frequencies of about 20 kilohertz.
4) ... determines if it is detectable by the human eye, although humans
are capable of seeing different types of wave lengths than other
species.
III. Are these sentences true or false?
1) When the frequency of the sound waves changes, it creates a change
of pitch in the sound that is not heard by the human ear.
2) Each type of light has different wave length frequencies.
3) Humans are among the greatest hearing species in the world.
4) Both light and sound are forms of energy that move in waves.
5) The level of sound wave frequencies that can be perceived is
dependent upon the capability of the species body.
B. Work with language
I. Match each word in A with its synonym in B.
А. to reverse, to conform, multitude, to occur, to come into being , relic,
evidence, moment
В. something surviving from the past, proof, to happen, a great number, to
turn in an opposite direction, instant, to correspond, to originate.
II. Give English equivalents:
a. частота световой волны
b. вызывать вибрации
c. инфракрасное излучение
d. жизненно необходимые знания
e. формы энергии
f. ультрафиолетовое излучение
g. зависеть от агрегатного состояния вещества
h. опознаваемый человеческими глазами
i. виды животных
j. пустое пространство
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III. Guess the words:
1)
dpees
2)
nisstec
3)
locro
4)
iglth
5)
cbusentsa
IV. Translate this text into Russian (in writing) and suggest your own title
for the text.
At the end of the nineteenth century, the teenager Albert Einstein read
a book series by Aaron Bernstein discussing the speed of light. The book
asked what would happen if an observer moved at the same speed as light.
Einstein thought much about the issue, and in particular, asked himself what
kind of electromagnetic field he would observe in that case. Einstein later
explained that this experiment convinced him already at that young age that
nothing could travel at the speed of light, since the field observed would
have a property not found in nature. Can you find out which one he meant?
Riding on a light beam situation would have strange consequences:
You would have no mirror image, like a vampire.
Light would not be oscillating, but would be a static field.
Nothing would move, like in the tale of sleeping beauty.
But also at speeds near the velocity of light observations would be
interesting. You would:
see a lot of light coming towards you and almost no light from the
sides or from behind; the sky would be blue/white in the front and
red/black behind;
observe that everything around happens very very slowly;
experience the smallest dust particle as a deadly bullet.
Can you think of more strange consequences? It is rather reassuring
that our planet moves rather slowly through its environment, when
compared to the speed of light.
(Adopted from
www.universe-physics.blogspot.com
)
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V. Render the text from Russian into English:
Достарыңызбен бөлісу: |