Учебно-методическое пособие по чтению специальной литературы для студентов 1 курса физического факультета. Дроздова И.В - 16 стр.

                                              16

1.    How are images brought into a focus in the refracting telescope?
A.    by turning the objective from left to right or from right to left;
B.    by modifying the distance between the eyepiece and the objective;
C.    by magnifying the image in the eyepiece or the objective;
D.    by enlarging the size of the eyepiece or the lens.

2.    In what instrument is the refracting principle still used today?
A.    cameras;
B.    telescopes;
C.    curved mirrors;
D.    opera glasses.

3.    What are the advantages of the reflecting telescopes over the refracting ones?
A.    they are more powerful;
B.    they have more lenses;
C.    they can be used in photography;
D.    they can be placed within reach.

4.    What is the purpose of the mirrors in the reflecting telescopes?
A.    to serve as an eyepiece;
B.    to angle light intensity;
C.    to disperse light rays;
D.    to reflect the observed image.

                                        Discussion
I.       In small groups of students distinguish between real images and virtual images
         for convex and concave lenses.

II. In pairs try and find the answer to the following: “ How does a magnifying glass
magnify?” Use the introductory phrases: I think ( believe, suppose, …); as far as I
can judge …; for all I know …; it is evident (obvious, unlikely, doubtful) that … .


                                           Unit IV

                                         Solar wind
Pre-reading activity
I.    What vocabulary items can you expect based on the title?

II.      The following are physical terms from this article. Use dictionaries to check
         the meaning, then fill in the spaces:

light, magnetosphere, heat energy, magnet, radiowaves, ultraviolet, terrestrial
atmosphere, x-ray irradiation, corona, ionospheric disturbances