Question

Intensity of the radiation received from the sun is the same regardless of the distance from the sun​? True or false

Answer 1

Intensity of the radiation is directly proportional to the distance from the sun. Therefore, answer is false.

Answer 2

Its false.

There is a fundamental concept in physics called 'Inverse square law'. It is applicable in case of light. This law states that a given quantity or intensity is inversely proportional to the square of the distance from the source. We know that earth revolves round the sun and the time period required for its one revolution is 365 days i.e., one year. In this one revolution, the earth keeps on changing its distance from the sun to form the oval orbit. These change in distances is the principle cause of various climatic conditions that we experience i.e., we can say that the climatic conditions are a result of changing intensities of solar radiations due to the change in distance between sun and the earth.