The London Olympic Games are coming soon. This summer,
Chinese sports fans will be able to watch the exciting games in 3-D on CCTV.
When you watch 3-D movies or TV, you have to wear a
special pair of glasses. The 3-D glasses make the people and the things on the
screen look like they are in the room with you.
3-D, means having three *dimensions: *width, height
and *depth. 3-D technology is based on the way the human brain and eye work.
Because the *pupils of a person’s eyes are about 6.5cm apart, when we look at
something, each eye sees it from different *angle. Our eyes send the two
pictures to our brain, and the brain puts them together. The small difference
between the picture from the right eye and the picture from the left eye make
us see depth.
While watching 2-D films, we don’t have to wear the
special glasses. We see the pictures in two dimensions, each eye get the same
information. This is because there is only one way of watching it.
So the aim of 3-D technology is to get a different
picture into each eye of the person. It uses two film *projectors. One
*projects a left eye picture and the other projects a right eye picture. When
we are in the cinema, we can see different pictures in each eye at the same
time with the help of the 3-D glasses.
While watching 3-D films, we feel that we are actually
in the same environment as the things we are watching. However, some people are
against watching 3-D films. One of the reasons is the 3-D glasses makes the screen
of the film or TV look darker. It is bad for eyes. What’s more, people with eye
problems may get headaches if they spend too much time watching 3-D movies, because
their brains need to work harder to “read” the pictures.
1.Paragraph 3 mainly tells us __________.
A.how we see
things in 3-D B.how we watch
the Olympic Games
C.how 3-D films
are made D.where we
watch 3-D films or TV
2.When we watch a 2-D film, each of our eyes get
________ information.
A.no B.different C.dark D.the same
3.Which is the following is right according to the
passage?
A.We don’t have to wear 3-D glasses if we watch games in 3-D on
TV.
B.The 3-D
technology is based on the way the human ear and eye work.
C.All the
people can have fun watching 3-D movies or TV for a long time.
D.3-D glasses
make us see different pictures in each eye at the same time.
4.Why are some people against watching 3-D films?
Because ____________.
A.they make
them more excited or sadder
B.3-D glasses
make the screen look darker
C.3-D films
make all people get headaches
D.they dislike
watching the Olympic Games