light energy


Light energy is the energy that comes from and travels through light. When moving, it behaves like an electromagnetic wave. But it also acts as a particle, since it is capable of interacting with matter. The unit of the International System of Measurements used to measure this kind of energy is the lumen second. This measurement indicates the amount of light energy emitted during a certain period.

Some of the light energy can be transferred to other bodies with which the light comes into contact. Certain surfaces have physical and chemical properties that allow them to absorb this type of energy. The orientation of the object with respect to light and its geometric shape also influence its absorption capacity.

Without a doubt, the sun is the main source of light on the planet. This star generates immeasurable amounts of light energy every second. Although only a fraction of it reaches Earth, it is more than enough to support life.

For some years, many researchers have shown great interest in capturing some of the sun’s energy. The advances made to date have their main application in the electrical industry. Let’s talk about the main techniques for obtaining electrical energy from the energy of light.

The first method uses solar panels placed at strategic points to capture light energy directly. When light falls on photovoltaic cells, they are responsible for absorbing its electrons.

With the second procedure, the light energy is not converted directly into electrical energy. Rather, through the mirrors, the sun’s thermal energy is intensified to heat a liquid. This fluid is heated to the boiling point. The pressure generated by the steam makes it possible for an electromechanical generator to have the necessary energy to operate.

Light energy is present at the origin of most of the phenomena we observe. Day and night exist due to the projection of the sun’s rays on the Earth, which is turning in on itself. In the cinema we can observe how light is projected. The mirrors we use are smooth, concave or convex and when the light hits them we have a certain angle of vision. These simple examples show that light energy is part of the world we live in. It is impossible to imagine a day without seeing a phenomenon without light energy.