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enquirealways
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If an extremely large no. ( may be infinite) waves are concentrated at one point, what effects can happen?
jtbell said:Waves of what?
Classically, multiple waves simply superpose ("add up") without affecting each other, if their differential wave equation is linear.
With very high energy densities, the linear assumption may no longer be true. With light waves, there's a whole field of "nonlinear optics" in which quantum effects come into play at high energy densities.
You can decompose any waveform into an infinite number of components. As for formation of particles:enquirealways said:I mean if infinitely large no. of EM waves concentrate at one point,
A.T. said:You can decompose any waveform into an infinite number of components. As for formation of particles:
http://en.wikipedia.org/wiki/Matter_creation
enquirealways said:If an extremely large no. ( may be infinite) waves are concentrated at one point, what effects can happen?
UltrafastPED said:Laser physicists do this all the time: concentrate light into small regions of space and time.
The spatial part is done through deformable mirrors; this is done in order to correct phase errors. Modern telescopes also use this principle. See http://spie.org/x87035.xml
The temporal part is done via laser pulse compression; this is the realm of the "ultrafast" lasers, lasers with pulse duration less than one picosecond (10^-12 seconds). This type of laser does not yield a narrow wavelength; it requires greater and greater bandwidth (=range of wavelengths/frequencies) in order to generate shorter pulses. Few femtosecond (10^-15 seconds) are regularly generated today.
The trick is to get a short pulse duration along with more energy in the pulse; power = energy/time, so the power density can be increased by increasing the pulse energy, or decreasing the pulse duration. Both can be done together with a chirped pulsed amplification (CPA) laser.
The irradiance is a measure of power delivered per unit of area; with a well focused laser the "spot size" is limited by the wavelengths of the light; the best that can be done is a spot about one wavelength in diameter. So for a typical CPA laser running in the near infrared (NIR) at 800 nm, the minimum spot size is about one micron in diameter.
As the power delivered increases, so the number of effects which can be measured. At 10^13 watts/cm^2 very fine holes can be "drilled" through thin sheets of metal - without any debris or signs of melting being left behind. This effect is exploited in modern laser eye surgery, and in micro-machining.
At 10^19 watts/cm^2 when delivered upon a metal or ceramic target, electron-positron pairs can be created.
At 10^22 watts/cm^2 electron, neutron, and proton beams can be generated, along with x-rays.
All of these experiments have been conducted in multiple laser labs. It is generally known as non-linear optics, or high field optical science. There are many threads of research using the same tools.
You can read more about this here: http://cuos.engin.umich.edu/
I did my dissertation at CUOS, creating far from equilibrium states in materials, and measuring the material response at sub-picosecond time steps.
enquirealways said:Thanks for an elaborate reply.
So, at the present moment, creation of a black hole doesn't seem a possibility via this method.
Concentrated waves are waves that have a very high amplitude and energy, causing them to have a significant impact on the area they hit. These waves can occur in various forms, such as ocean waves, seismic waves, or sound waves.
When concentrated waves hit a single point, they can cause significant damage and disruption. This impact is determined by the intensity and duration of the wave, as well as the material and structure of the point being hit.
The effects of concentrated waves at a single point are influenced by several factors, including the amplitude and frequency of the wave, the angle of incidence, the material and structure of the point being hit, and the surrounding environment.
Infinite wave impact, also known as rogue waves, can have severe consequences. These can include damage to structures and infrastructure, loss of life, and disruption of marine ecosystems. They can also cause financial losses and have a significant impact on coastal communities.
Scientists use various methods to study the effects of concentrated waves at a single point. These can include laboratory experiments, computer simulations, and field studies. By analyzing data and observations, scientists can gain a better understanding of the behavior and impact of concentrated waves.