Английский язык. Ч.3 (Units 9,10). Ильичева Н.А - 43 стр.

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1) – How soon does light reach observer a) … O
1
moves to the right during the
O
1
from points A
1
and B
1
? time the light is traveling to O
1
from
– We can see that … A
1
and B
1
.
2) – What does observer 2 notice and b) … the relative speed of the two
measure? reference frames is very large or the
– According to observer 2 … distances involved are very large.
3) – What does observer 1 notice? c) … the two bolts of lightning strike
– Observer 1 doesn’t see … simultaneously.
4) – How does light travel for O
1
and O
2
? d) … the light from B
1
has already
– Light travels … passed O
1
whereas the light from A
1
has not yet reached O
1
.
5) – What is the distance between O
1
A
1
e) … at the same speed for both of them.
and O
1
BB
1
?
– The distance …
6) – Why doesn’t observer O
1
see the f) … they are both right.
events simultaneously?
– Because …
7) – Two events are simultaneous to g) … the two events happen
observer O
2
in one reference frame simultaneously.
but they are not simultaneous to
observer O
1
from the other reference
frame. Which observer is right?
– The answer according to relativity
is that …
8) – Why aren’t we aware of the fact h) … O
1
A
1
equals O
1
BB
1
.
that simultaneity is not an absolute
concept but relative in everyday life?
– Because the effect is noticeable only
when …
43
1) – How soon does light reach observer a) … O1 moves to the right during the
    O1 from points A1 and B1?                    time the light is traveling to O1 from
  – We can see that …                               A1 and B1.
2) – What does observer 2 notice and            b) … the relative speed of the two
    measure?                                     reference frames is very large or the
  – According to observer 2 …                     distances involved are very large.
3) – What does observer 1 notice?               c) … the two bolts of lightning strike
  – Observer 1 doesn’t see …                      simultaneously.
4) – How does light travel for O1 and O2? d) … the light from B1 has already
  – Light travels …                              passed O1 whereas the light from A1
                                                  has not yet reached O1.
5) – What is the distance between O1A1 e) … at the same speed for both of them.
    and O1B1?B




  – The distance …
6) – Why doesn’t observer O1 see the            f) … they are both right.
    events simultaneously?
  – Because …
7) – Two events are simultaneous to             g) … the two events happen
    observer O2 in one reference frame             simultaneously.
    but they are not simultaneous to
    observer O1 from the other reference
    frame. Which observer is right?
  – The answer according to relativity
    is that …
8) – Why aren’t we aware of the fact            h) … O1A1 equals O1B1.  B




    that simultaneity is not an absolute
    concept but relative in everyday life?
  – Because the effect is noticeable only
    when …
                                           43

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