In an open system, it is not possible to raise the temperature of a heat source by reflecting its heat back to itself. This concept violates the principles of thermodynamics, specifically the second law of thermodynamics, which states that heat naturally flows from hotter objects to colder objects.
When you reflect heat back to its source, the heat would be redirected back to the original heat source, but it wouldn't increase the source's temperature. Instead, it would essentially be recycling the heat energy within the system. The second law of thermodynamics dictates that the net flow of heat will always be from the hotter object to the colder object until thermal equilibrium is reached.
For example, let's consider the sun as the heat source. The sun emits an enormous amount of heat and light energy, and it radiates this energy into space. If you were to reflect all the energy back to the sun, it would essentially bounce back and forth, but it wouldn't increase the sun's temperature. The sun's temperature is determined by its internal processes, primarily nuclear fusion, which generates immense heat and light.
Reflecting the sun's energy back to itself would not lead to a temperature increase because it violates the fundamental principles of thermodynamics. Heat transfer within an open system follows the natural flow from hotter regions to colder regions, and it cannot be used to increase the temperature of a heat source on its own.