Question

Only one part of ____________ billion parts of sun's radiation reaches the earth.

• A. 2
• B. 3
• C. 4
• D. 5

Answer 1

The correct option is A 2

Only one part of 2 billion parts of sun's radiation reaches the earth.

The sun's radiation must make it through multiple barriers before it reaches Earth's surface. The first barrier is the atmosphere. About 26% of the sun's energy is reflected or scattered back into space by clouds and particulates in the atmosphere 34. Another 18% of solar energy is absorbed in the atmosphere.