Breaking a glass using an electromagnetic wave

In summary, the conversation discusses the possibility of breaking a glass using an electromagnetic wave at its resonant frequency. One person suggests using sound frequencies to break a glass, while another is unsure if it would work with electromagnetic frequencies. They mention that if the EM wave is directed at one part of the glass, it can cause uneven heating and expansion, potentially leading to the glass breaking. They also mention that the resonant frequency of a crystal cannot be determined and varies depending on factors such as the amount of lead and the shape of the crystal. Another person suggests that glass, being a dielectric, can potentially be broken with an electromagnetic wave but would require a significant amount of power. They also mention that it would be easier to use a conductive
  • #1
eoghan
210
7
Hi there!
I was wondering: is it possible to break a glass using an electromagnetic wave at its resonant frequency?
 
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  • #2
Well, I've heard of using resonant sound frequencies to "break a glass"
Not sure about resonant EMF.
 
  • #3
At first read, I thought it extremely unlikely. EM covers an awful lot of bandwidth, though. Perhaps if the frequency of EM falls within a range that the glass absorbs rather than passing or reflecting, it could work. I don't know enough about it to give a reliable opinion.
 
  • #4
An EM wave of high enough intensity and at a frequency that the glass absorbs, if dirrected at one part of the glass but not at another will cause uneven heating. This will translate into uneven expansion which can cause cause the glass to break.
 
  • #5
Uhm.. do you know the resonant frequency of a crystal?
 
  • #6
eoghan said:
Uhm.. do you know the resonant frequency of a crystal?

I don't think that you can actually determine that other than experimentally. As far as I know, all crystal stemware, ornaments, et al are made of lead crystal. The amount of lead present varies, so it seems to me that the resonance frequency would as well. Also, the specific shape probably makes a difference.
 
  • #7
Glass is a dielectric, so in principle this should be possible, but would require a substantial amount of power. It would be far easier to electrostatically drive the fundamental frequency of a glass with a thin, even transparent conductive coating.
 
  • #8
Non-resonant is fairly easy

http://www.thomasnet.com/articles/image/laser-cutting-machine.jpg
 

FAQ: Breaking a glass using an electromagnetic wave

1. How can an electromagnetic wave break a glass?

Electromagnetic waves, also known as light waves, carry energy and when they interact with materials, such as glass, they can transfer this energy to the molecules in the glass causing them to vibrate and eventually break apart.

2. What type of electromagnetic wave is most effective in breaking glass?

The type of electromagnetic wave that is most effective in breaking glass is ultraviolet (UV) light. This is because UV light has a higher frequency and shorter wavelength than visible light, allowing it to transfer more energy to the glass molecules.

3. Can any glass be broken using an electromagnetic wave?

No, not all types of glass can be broken using an electromagnetic wave. The glass must have a resonant frequency that matches the frequency of the electromagnetic wave in order for it to be broken. This is known as the "critical frequency."

4. Is it safe to use an electromagnetic wave to break glass?

It is generally safe to use an electromagnetic wave to break glass as long as proper safety precautions are taken. However, it is important to note that the energy from the electromagnetic wave can also affect other materials and could potentially cause harm if not used correctly.

5. Are there any practical applications for breaking glass with an electromagnetic wave?

Yes, there are several practical applications for breaking glass with an electromagnetic wave. One example is in the manufacturing industry where precise cuts and breaks are needed in glass materials. Another example is in the medical field where tiny glass particles need to be broken down for certain procedures.

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