Sunday, March 28, 2010

Radio: A Newfangled Technology

When we hear the word radio, we think immediately of the entertainment systems in our cars and in our homes. But radio waves, a type of electromagnetic radiation, in reality have much broader applications than this.
Radio waves have a very broad range of frequencies and wavelengths, which contributes to their broad range of applications. Their frequencies range from 3 kHz to 300,000 MHz, and their wavelengths range from .3 m to 90 m.
Artificial sources produce many of the radio waves that serve beneficial purposes in our everyday lives. The two types of these waves are digital and analogue. Both see use in different areas of our lives; analogue waves are more frequently used in radio, whereas digital waves are used television programming. However, radio waves can also originate from astronomical objects such as Jupiter, our sun, and the center of the milky way galaxy.
Beyond entertainment, there are several useful applications of radio waves. Radio waves, when concentrated in a specific area, can greatly heat that area. This can be used for minimally invasive surgeries, such as a cardiac surgery where a diseased area of the heart is destroyed through concentrated application of radio waves. Refraction of radio waves can also be used to image objects through walls by analyzing the varying speeds at which they travel through different mediums. This would allow law enforcement to see what was inside a building in, for example, a hostage situation.
There are no safety precautions necessary when dealing with radio waves, as it is nearly impossible to accidentally injure oneself with them.

9 comments:

  1. The applications of radio waves are impressive. The way that the police use them is similar to infrared waves, They are used to track criminals using their own heat from their body, so they can be seen through walls. You have some very good information, and i learned a lot.

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  2. Great writing Michael. I never knew about the different types of radio waves and how they each have different uses. Also, I was surprised to find out the radio waves can even be used to help in surgeries and how safe it is. Great job!

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  3. I thought it was interesting that radio waves's regions of frequencies and wavelengths are so broad. This blog was very interesting.

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  4. I'm glad that you delved into the more obscure applications of radio waves. It kept it interesting and I learned a thing or two. Very to the point and easy to read.

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  5. I thought that this blog was very interesting and i was very impressed on how well written and thought out this was. Radio waves are complicated and you did a great job describing them all.

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  6. The numerous applications for radio waves was extensive, and I found to be enthralling. I was also thunderstruck by the piece of information that radio waves have no safety considerarions because so far, the blogs about other parts of the EM Spectrum have all had precautions. Nicely Written.

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  7. i found that the sources of this type of wave were very interesting. this was very well written but shoul've had some pictures. nice job!

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  8. Many interesting applications. I also never new that radio waves cold be generated from the center of our galaxy. All together, very nice.

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  9. The information in the blog was very nice Michael but I wish you would've included some more media. I especially found interesting, like twin 1, that radio waves could be created from the center of the galaxy. Good job.

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