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Home General Knowledge Physics See What Others Are Saying!
  • Question
  • Radio waves sent out by a radio stations are reflected by


  • Options
  • A. troposphere
  • B. stratosphere
  • C. mesosphere
  • D. ionosphere

  • Correct Answer
  • ionosphere 

    Explanation

    This is a layer of atmosphere about 60 to 70 km above the earth and extends to about 400km. It contains ionised particles which can reflect radio waves making radio communication round the world possible.


  • More questions

    • 1. In the United States the television broadcast standard is...?

    • Options
    • A. PAL
    • B. NTSC
    • C. SECAM
    • D. RGB
    • Discuss
    • 2. Where is the headquarters of Intel located?

    • Options
    • A. Redmond, Washington
    • B. Tucson, Arizona
    • C. Santa Clara, California
    • D. Richmond, Virginia
    • Discuss
    • 3. Where was the yo-yo invented?

    • Options
    • A. France
    • B. United States
    • C. Philippines
    • D. England
    • Discuss
    • 4. Which of the following is concerned with the study of characteristics, origin and development of land forms?

    • Options
    • A. Ecology
    • B. Geography
    • C. Geology
    • D. Geomorphology
    • Discuss
    • 5. Who was the first Indian batsman to hit a century on Test debut against England at England's home?

    • Options
    • A. Sachin Tendulkar
    • B. Abbas Ali Baig
    • C. Kapil Dev
    • D. Wassim Jaffer
    • Discuss
    • 6. When did Sachin Tendulkar make his Test debut?

    • Options
    • A. 1986
    • B. 1991
    • C. 1990
    • D. 1989
    • Discuss
    • 7. The first electric train of India 'Deccan Queen' was run between

    • Options
    • A. Howrah and Delhi
    • B. Bombay and Surat
    • C. Kalyan and Pune
    • D. New Delhi and Madras
    • Discuss
    • 8. Electric current is measure by

    • Options
    • A. commutator
    • B. anemometer
    • C. ammeter
    • D. voltmeter
    • Discuss
    • 9. Who developed the idea of Crop Rotation?

    • Options
    • A. Potato Peterson
    • B. Turnip Townsend
    • C. Cabbage Carlson
    • D. Swede Svenson
    • Discuss
    • 10. The major geological events of the Palaeozoic era include

    • Options
    • A. Caledonian mountain rise, life comes ashore
    • B. Appalachians and Central European mountains come up
    • C. both (a) and (b)
    • D. None of the above
    • Discuss


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