Q: 27 (IAS/2011)

A layer in the Earth’s atmosphere called Ionosphere facilitates 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/ correct?
question_subject: 
Geography
question_year: 
2011
question_exam: 
IAS
question_sub_subject: 
Physical Geography
question_topic: 
Atmosphere
stats: 
0,3272,4408,632,3000,776,3272