OT: Science Question

The earth's tilt is always nearly the same which means the actual position of both hemispheres remains the same throughout the winters and summers. But the positions of hemisphere change in relation to the Sun. When it is summer in any particular hemisphere it means that sunlight hits the earth at a more direct angle (as Sun is relatively higher in the sky) which means energy would be concentrated in smaller space than when sunlight hits earth at a shallow angle. When it is winter the sun is relatively lower in the sky and thus the sunlight will come at a shallow angle and thus spread out more and will be less dense.

As an experiment try to light a torch right from above. You will see it will spread more light in a limited area. Now hold the torch at a slanted angle and you will see that even though it will spread light in a greater area the light will not be as bright as before.