Lab - Visio - Surface temperature of planets

Principle
We want to measure the influence of the light energy emitted by the sun (symbolized by a lamp) on the temperature at the surface of the Earth, a round surface (symbolized by a half-sphere). We measure with a detector the variation of energy received by a given surface depending on the distance from the lamp. The spherical emission of energy leads to a dependence inversely proportional to the square of the distance from the sun.