Light waves, Mechanical Waves, and Radiation

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By Marc Gabay

Waves are a very interesting topic, if you take the time to think about it thoroughly; for example, light waves or radiation. The kinds of light waves from our sun are visible light ways. On average, it takes roughly 8 minutes and 20 seconds for the sun's light rays to reach Earth. That being said, if the sun were to suddenly disappear out of the universe, it would take a little more than 8 minutes before we realized it was getting a bit chilly. Light travels fast, however space is so big and vast that it takes many years even for distant stars, galaxies, and/or planets to even come into sight. As a result of this, as we look onward into space, we're really looking back into time. Light waves are very interesting this way.

Next, Another way that light waves are interesting is that they affect the human body in both positive and negative ways. These types of light waves can be UV light waves or infrared waves. Infrared radiation is pretty much just heat. This radiation can be very harmful to the body. However, this can only happen if it was "highly concentrated into a narrow beam". Meaning, if it is hot enough. For example, if you place your hand on a hot stove, you immediately recoil. This is obviously harmful infrared radiation. Every object that is not at absolute zero (the coldest temperature) emits infrared radiation.

Lastly, some of the most common waves are mechanical waves. Mechanical waves are waves that are emitted from anything that has motion or energy. Mechanical waves are basically anything to exist, pretty much. It's also an oscillation of matter, so it passes energy through a medium. As a result, it doesn't move far from its starting point. Sound waves are examples of mechanical waves. Also, some light waves can be considered mechanical waves; it really depends on the type of light.

I get the feeling that in later years, scientists will find more types of waves out in space somewhere. If this does happen, then more can happen and eventually, not in a few years, but in many more years to come, they may make a huge discovery one day. There really is no way to tell what are the possibilities that scientists can find until they find it. We can make very inaccurate guesses though. We might even find different types of all the known waves. The only thing we know about this is that, we don't know.

Links: Infrared Light Information: Coolcosmos.edu
How Fast Light Travels: Phys.org

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