What is light? Detailed answer

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What is light? Detailed answer

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What is light?

Without light, we would not be able to see the world around us, and nevertheless, we do not know exactly what light is!

We know that light is a form of energy. We can measure its speed and we know its characteristics. We also know that white is not a single color, it is a combination of all colors. It's called "spectrum".

We know that color is not the object itself, but the rays of light that emanate from it. Green paper looks green because it absorbs all other colors except green, which is what our eyes see. Blue glass transmits only blue light, all the rest is absorbed by it.

Sunlight is energy. The heat of the sun's rays, focused by the lens, turns into fire. Light and heat are reflected by white surfaces and absorbed by black ones. That's why white clothes are colder than black ones.

What is the nature of light? The first who tried to seriously study the study of light was Isaac Newton. He believed that light is composed of corpuscles, which are shot like bullets by a light source. But some of the characteristics of light could not be explained by this theory.

Another scientist, Huygens, offered another explanation for the nature of light. He developed the "wave" theory of light. He believed that light creates impulses, or waves, in the same way that a stone thrown into a pond creates waves.

For nearly 150 years, scientists have debated whether light is waves or corpuscles. Most scientists have accepted the wave theory. But then new discoveries followed, which called into question this theory.

What views do scientists hold today on the origin of light? It is now believed that light waves have the characteristic features of both particles and waves at the same time. Experiments are underway to support both theories. So far, there is no answer to the question, what is light.

Author: Likum A.

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