Английский язык. Ч.3 (Units 9,10). Ильичева Н.А - 45 стр.

2. The light sent by the traveler across the spaceship travels the same distance to
  both observers because the light propagates at the same speed (T/F).
3. The time interval between the two events (the sending of the light and its
   reception on the spaceship) is smaller for the observer on Earth than for the
   observer on the spaceship (T/F).
4. Clocks moving relative to an observer on Earth are measured by that observer
   to run more slowly (as compared to clocks at rest) (T/F).


16. Time dilation has aroused interesting speculation about space travel.
   Read the statements (1–4). Use the prompts (a–f) to say why you agree or
   disagree with them.
1. It is possible for people to reach a star 100 light years away.
2. According to people on Earth it is just the clocks that would slow down for
   the astronaut traveling at a very high speed.
3. Time will pass more slowly on Earth than on a spaceship because as soon as
   the spaceship is launched, the Earth will start moving away from astronauts.
4. Time would pass so slowly for the traveling astronauts that it would be
   destructive for them psychologically. They wouldn’t be able to adapt to it.


a) Time dilation can be applied only by observers in inertial reference frames.
b) One light year is the distance that light can travel in one year. Ordinary
   mortals wouldn’t be able to travel for one hundred years.
c) All processes, including life processes, would run more slowly for the
   astronaut according to the Earth observer.
d) Time dilation allows us such a trip. The traveling astronaut would age less
   because only 4,5 years would pass for the traveler whereas 100 years would
   pass for the people on Earth.
e) Time on the spaceship would seem to pass slow only to the Earth observers,
   but to the astronauts time would pass in a normal way.
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