Check your understanding

Exercise 1. Answer the following questions.

1. What do you know about the history of spectacles?

2. How did Galileo Galilei contribute to the development of the telescope?

3. What instrument helps us to examine minor things and who was its maker?

4. How were views of the nature of light changing through the history?

5. What revolutionary advances were made in optics in the 20^th century?

Exercise 2. Complete the sentences:

1. According to a legend Archimedes…

2. Johannes Kepler provided…

3. Thomas Young revealed…

4. Maxwell came to the conclusion that…

Increase your vocabulary

Exercise 1. Match the synonyms.

1	2
spectacles	processing
sight	eyeglasses
speed	view
technology	velocity
to start	to discover
to enlarge	to improve
to find	to begin
to update	to magnify
	to invent
	to polarize
	to replace
	to design
	to store

Exercise 2. Compare two columns and find Russian equivalents to words or word-combinations.

1	2
1) adjacent pinholes	роговая оболочка
2) particle	линза из изумруда
3) cornea	окуляр
4) corpuscular nature of light	постоянный
5) bifocal	оптические технологии
6) emerald lens	корпускулярная природа света
7) eyepiece	система коррекции
8) immutable	сетчатка
9) optical processing	зрачок
10) pupil	сосуд
11) refractor	увеличение
12) retrieval systems	очки
13) retina	частота
14) spectacles	зрительное восприятие
15) vessel	рефрактор
16) magnification	частица
17) frequency	бифокальные очки
18) vision	точечные источники света, расположенные друг против друга
	свойство
	фотоаппарат
	микроскоп

LANGUAGE ACTIVITY

Exercise 1. Form plurals of the following nouns and translate them into Russian.

a) ray, device, history, lens, star, paper, sound, source, datum, chief, glass, spectrum, radius, formula;

b) freshman, man-servant, text-book, eyeglass, cross-section, pinhole, headphone, keyboard, paperboard, twin-engine, statesman, eyepiece.

Exercise 2. Insert articles where necessary.

1. … Sir Isaac Newton, a great scientist and thinker, is known by… invention of … reflecting telescope.

2. … people not only wanted to admire distant stars through telescopes, but to make closer some minor things.

3. … story about Archimedes is … legend written centuries later.

4. Some think that eyeglasses were invented by … Chinese.

5. … first great improvement of … microscope was due to Robert Hooke.

6. The construction of … first laser in … 1960 led to … revolutionary advances in optics in … 20^th century.

Exercise 3. Insert prepositions of time where necessary.

1. … 1801 Thomas Young discovered the interference of light from adjacent pinholes.

2. … the 20^th century the revolutionary advances in optics began with the construction of the first laser … 1960.

3. I’m busy … the moment (now).

4. It sometimes snows … Christmas.

5. I often work … night.

6. The movie was to start … nine … the morning.

7. I was there … last night.

8. It happened … Sunday.