What is light? Have you ever wondered that question? You are not alone, because the answer to your question is continuously sought by scientists and inventors everywhere. In fact, since the discovery of light, there have been quite a few scientific breakthroughs revolving around what is light.
Before we get into what is light, let us first define what light actually is. Light is a continuous stream of ultraviolet (UV) radiation, which consists of all wavelengths in the visible spectrum. Some types of light include red light, violet light, blue light, ultraviolet light, gamma rays, x-rays, infrared light, and green light. Some types of light could be emitted onto the earth’s surface, while others could escape completely through the atmosphere.
All the light that makes up the visible spectrum of light can be classified into three main categories: all the colors of light, visible light, and infrared light. The reason why this is so important to understand is because we need all of these types of light to see. We cannot possibly see if there are no visible light waves present as we would be blinded by just electricity in its raw state. Therefore, the very first question we must ask ourselves is what is light made of when it comes into contact with an electric conductor?
There are several theories about what is light but one of the most popular theories is that the light is made of vibrating atoms. The theory states that the atoms make light when the electrons move from their high energy levels to a lower one. The electrons transfer their valence bands onto the exposed side of the crystal, which in turn makes the band of colors or all the colors of the visible spectrum. This sounds very complicated and it may even confuse some people, but once you break it down, it actually makes sense. This also explains why different colors of light appear at different wavelengths: the violet, green and orange wavelengths are all created when the electron to move from a high energy state to a low energy state while red, yellow and blue are produced when the electron moves from a low to high orbital.
Now, let us consider what exactly happens when this electrical activity takes place. The electromagnetic radiation from the sun is converted into heat radiation by the earth’s surface temperature. This heat absorbed by the ground causes the air temperature to increase causing the sun to expand it’s outer surface. This expanding occurs at a rate of roughly 7 kilometers a second due to the earth’s rotation. This movement of the earth causes the variation in air pressure over the surface of the earth, which helps us to observe the changing sun’s rays at different times of the day and at night.
To get a clearer picture, we must emphasize the fact that the light we observe has a wavelength. This means that each different wavelength of light has its own frequency, which is completely different from the other wavelengths. A closer look at the sun would prove this fact by observing the sunlight as an extremely bright light in the ultraviolet range. The sun’s rays have a complete different wavelength from the violet to the gamma rays. Anytime you see the sunlight, take note that there are distinct bands of colors which can be seen clearly.
So, once we got the basic understanding on what light is, we might be wondering how it works. In simple words, light is simply a combination of energy waves. For instance, the sound is a combination of electric waves and chemical vibrations. The light is a combination of electromagnetic waves and electric waves. Now, since light has different components which makes it a combination of differing wavelengths, one cannot say that light travels in only one way.
Light can travel in different directions depending on the wave that is used to send the signal. The blue wavelength can send sound waves and red wavelength can send light waves. So, the next time you ask yourself what is light?, try to visualize what all these different colors are for. There is more to light than we probably know and it’s definitely more interesting than we are. So, next time you’re asking what is light?, try to get a grasp of what waves can do.