Task 3. Read the text again and find the English equivalents for the following words

Изображение, распространение, видимый, свойство формирования изображения, по отношению к, длина, применение, количество информации, погрешность изображения, фотопластина, оптические методы, геометрическая оптика, переносить.

Task 4. Match the words with the similar meaning.

1. genesis (N) 2. device (N) 3. govern (V) 4. involve (V) 5. broaden (V) 6. expound (V) 7. reconstruction (N) 8. branch (N)

a) appliance b) field c) explain d) extend e) control f) origin g) resurgence h) include

Task 5. Choose the correct words.

1. Optics uses a lot of special devices / branches.

2. Optics is divided / expounded into physical and geometrical one.

3. All types of waves are broadened / governed by a single equation of wave motion.

4. Optics deals with the propagation / resurgence of light.

5. Since 60s of the 20^th century lens design has undergone / investigated great changes.

Task 6. Decide if the statements are true, false or not mentioned in the text.

1. The science of optics considers the phenomena closely related with light production.

2. The term «optics» refers only to eye and vision.

3. C.F. Gauss wrote his famous book on physical optics.

4. Geometrical optics also involves optical data processing.

5. Optical methods are applied to the wave and quantum nature of light.