11th Geography NCERT Chapter 8

– Solar Radiation, Heat Balance, and Temperature

– Solar Radiation: The earth receives most of its energy in short wavelengths known as insolation. The amount and intensity of insolation vary due to factors like the earth's rotation, angle of the sun's rays, and length of the day.

– Variability of Insolation: Factors like the earth's axis tilt and the angle of sun rays influence the amount of insolation received at different latitudes.

– Heat Budget of the Planet Earth: The earth maintains its temperature through a balance of heat received from the sun and heat radiated back into space, known as terrestrial radiation.

– Variation in the Net Heat Budget: There are variations in the amount of radiation received at the earth's surface, with some regions having a surplus and others a deficit in the net radiation balance.

– Inversion of Temperature: Inversion of temperature, when temperature increases with elevation, can occur in certain conditions like clear winter nights with still air.

– Spatial Distribution of Insolation: The insolation received at the earth's surface varies from about 320 Watt/m2 in the tropics to about 70 Watt/m2 in the poles, with maximum insolation over subtropical deserts.

These are some important topics students should study from the chapter provided in the file "Solar Radiation, Heat Balance and Temperature"【4:0†source】.