Light consists of transverse electromagnetic waves. While some claims that there is a possibility for light to exist in longitudinal EM waves, none have been proven so far. What's transverse EM waves? Basically it looks like this:
The properties of transverse EM waves is that when the electrical portion of light oscillates up and down, the magnetic portion oscillates in right or left while propagating forward (try to imagine in 3D). The properties of electromagnetic waves have been discovered by many scientists, among them are Michael Faraday, James Clerk Maxwell, Max Planck and even the great Einstein himself.
As most of you know, there are spectrum of light that we can see and also that we can't. The portion of what we can see is called a visible light which is basically the spectrum of light which is from 390nm to 750nm. Some people, through God's work, may be able to see beyond this spectrum, which i'm sure sounds pretty awesome while the fact is it isn't. Have you tried to see your x-ray picture or infrared devices? The picture sucks. Just be grateful that you can see beautiful things in visible light will ya? (>_<)
Celeritas. It's a Latin name for swift or speed. In science, the symbol "c" is meant for the speed of light, which is 299,752,458 m/s if travels in vacuum. What's so special about this number? Well, according to Einstein, if you squared this number and multiply by the mass of an object, you can get the amount of energy that can be created IF all portions of the object is converted to energy without loss. So far no invention achieved this speed. Even using the Large Hadron Collider, the particle can only accelerate at 99.99% from the speed of light itself.
By understanding the properties of light, we came out with many inventions that help us doing our everyday work. Solar panel, spectacles, even your television also involves the understanding of light. The only question remains about light is what if the speed of light is different? It's the same with other constant that we used, all have their own uncertainties and limitations. You see, the more you understand something, the more you seem like you know nothing about our universe. But hopefully, whatever you read here can give you some thought, and hopefully make us understand what universe can do and what it can tell us about the power of its creator.
I think that is all from me today. Oh yeah, i wanna read Stephen Hawking's book about the Brief History of Time but i don't have any money. Maybe later i'll tell you about what time actually is and given that we use time everyday, it may change your opinion about this world a bit. But as for now, adios!
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