Motions of the Earth — Social Science STD 6 — Question

The sun rays of the noon are hottest in comparison to the sunrays of the morning and evening. This is because the rays of the sun are almost vertical at noon. They fall over a small area and hence give a greater amount of heat that means the heat received at per unit area increases. The rays of the sun are slanting in the morning and in the evening. They spread over a wider area and hence they cover larger area but give less amount of heat. That is why it is hotter when the sunrays are vertical at a place.