TOEFL - READING PRACTICE PASSAGE 3

What is the main topic of the passage?

• The use of false colors in image processing

• The use of wide-field telescopes in astronomy

• New astronomical theories

• Methods used by astronomers to obtain information

The word “employed” in line 3 is closest in meaning to

• measured

• inspected

• used

• purchased

The word “efficient” in line 10 is closest in meaning to

• productive

• frequent

• objective

• visible

Which of the following is NOT mentioned as an advantage of glass-plate photographs?

• They can be measured accurately.

• They can capture the images of faint objects.

• They can be stored for a long time.

• They can be processed quickly.

Astronomers most probably use direct photography less frequently today than in the past because

• glass plates are no longer available

• only a small amount of information is contained in a single photograph

• alternate ways of observing images have been developed

• photographic data deteriorates quickly

What is image processing?

• The process of light waves striking a glass plate

• A way to produce images more quickly

• A reevaluation of old photographs

• A way computers can present data for analysis

The word “undetectable” inline 23 is closest in meaning to

• immense

• inferior

• imperceptible

• intolerable

Why do computer-generated images use false colors?

• The real objects are too bright to look at.

• The computer screens have a limited range of colors.

• The properties represented in the image are not otherwise visible.

• The colors are used to convert black-and-white photographs.

Why does the author mention“x-ray emissions” in line 25?

• To discuss the measurement of energy flow

• To emphasize the precision of direct photography

• To provide an example of what false colors represent

• To compare the properties of color and movement

Where in the passage does the author mention a disadvantage of photography?

• Lines 1-3

• Lines 7-11

• Lines 18-21

• Lines 24-25