UPSC Civil Services 2011 Prelims General Studies Paper I
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Question : 27 of 100
Marks:
+1,
-0
A layer in the Earth’s atmosphere called ionosphere facilities radio communication. Why ?
1. The presence of ozone causes the reflection of radio waves to earth.
2. Radio waves have a very long wavelength.
Which of the statements given above is/are correct?
1. The presence of ozone causes the reflection of radio waves to earth.
2. Radio waves have a very long wavelength.
Which of the statements given above is/are correct?
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