Английский язык. Ч.3 (Units 9,10). Ильичева Н.А - 16 стр.

d) … the angle of incidence, the height BD is half of the height AE. Because AE
= 1,60 m – 0,10 m = 1,50 m, then BD = 0,75 m. If you want to see the top of
your head, the top e) … of the mirror only needs f) … point F, which is 5 cm
below the top of your head (half of GE = 10 cm). Thus, DF = 1,55 m, and the
mirror needs to have a vertical g) … of only (1,55 – 0,75 m) = 0,80 m. And the
mirror’s h) … edge must be 0,75 m above the floor. In general, a mirror needs to
be only i) … as tall as a person to see all of himself or herself and it does not
depend upon the person’s distance from the mirror.




                                   Figure 7.


15. Make the statements complete by matching the optical instruments
   (1–8) with their descriptions below (A–H).
1. The spectroscope …              5. The refracting telescope ….
2. Polarizing sunglasses …         6. The reflecting telescope ….
3. The magnifying glass …          7. The Hubble space telescope is a reflecting
4. The telescope …                    telescope that …
                                   8. The spectrometer ….




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