Radiophysics. Халюшева Г.Р. - 27 стр.

       1.What is the difference between radio – and sound waves? 2.Now do we call the
distance from the top of one wave to the top of the next? 3.What is the height of a wave?
4.What is the wave frequency? 5.What have you learnt about the microphone? 6.What is
the carrier frequency? 7.What is the function of the antenna in a radio receiving set?
8.Why do you get poor reception on FM or TV sets it you live beyond 50 miles from the
station? 9.What is the difference between ground waves and sky waves?
        6.3.4    Insert the necessary prepositions:

         1. Radio waves travel long distances ________ space.2. A radio message may travel _______ the world. 3. There,
sound waves are changed ______ varying electric currents. 4. If you drop a stone _____ water, circles of waves start to
travel _____ all directions. 5. The distance ______ the top of one wave ____ the top of the next is the wave length. 6. Sound
waves range _______ 16 ____ 20,000 vibrations _____ second. 7. The voltage ____ this fluctuating current is now
increased _______ means ____ an audio amplifier. 8. The carrier waves ______ radio take the place _____ the wires______
telephone. 9. Each broadcasting station sends _______ waves ______ a certain frequency. 10. Radio waves leaving the
antenna _____ the sending point go ___ all directions.

        6.3.5    Reproduce the text

        6.3.6    Form adjectives from the given words and translate them into Russian:


        - ful: help, wonder, use, power
        - less: use, help, power, motion, weight
        - ic: period, metre, atmosphere, base
        - al: physics, nature, experiment, mathematics
        - able: value, change, measure, compare
        - ant: import, resist
        - ent: differ, insist
        - ive: effect, act



        6.3.7    Translate the following word–combinations, paying attention to the adverbs:


        a valuable theory – a highly valuable theory
        an important discovery – a greatly important discovery
        an experimental construction – a largely experimental construction
        a productive method – a highly productive method
        equal volumes – nearly equal volumes
        big supplies of energy – immensely big supplies of energy
        simple devices – equally simple devices
        efficient research – highly efficient research .
        6.3.8    Translate the sentences:


        1. The farther out circles of waves go, the smaller the waves become.
        2. The longer the waves, the lower their frequency.
        3. The nearer the Earth, the denser the atmosphere.
        4. The more experiments scientists make, the greater is their knowledge of the structure of matter.
        5. The bigger the mass, the bigger the weight of the body.
        6. The nearer the centre of the Sun, the higher the temperature.
        7. The more the scientist studied the problem, the better he understood its importance for man.
        8. The stronger the magnet, the greater the distance through which it acts.