Солнце над горизонтом
Scientific adviser GlobalLab asking questions ... discuss?
If we are going to have a ball on the forehead, it is better, in the form of oblique impact than direct, right? So it is with particles of light - photons; they can be likened to the balls flying at high speed about 300 000 km / s and the amount of energy that they transmit depends on the angle of incidence ... is about the theory behind the fact that by the autumn, when the sun is below the horizon, it is less warms land ... But here's an interesting question ... how plants know that the sun was below the horizon? After cooling takes place in the summer? What is one of the main signals of autumn?