Q. In what form does the earth receive the sun’s radiation?

1. Short wave
2. Long wave

Select the correct code from the options given below:
Answer: Only 1
Notes: The atmosphere of the earth is not heated directly by the sun. The incoming energy  .i.e. insolation is mostly in the form of short-wave radiation. The earth absorbs short wave radiation during daytime and reflects back the heat received into space as long-wave radiation which is mostly infrared radiation during night.