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Geography › ClimatolgyXAtmosphere
A layer in the Earth’s atmosphere called the 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.
(a)
1 only
(b)
2 only
(c)
Both 1 and 2
(d)
Neither 1 nor 2
(D)
The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1. There are no clouds or water vapour in the lower stratosphere. 2. There are no vertical winds in the lower stratosphere.
(C)