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In computer graphics, ray tracing is a technique for generating an image by tracing the path of light through pixels in an image plane and simulating the effects of its encounters with virtual objects. The technique is capable of producing a very high degree of visual realism, usually higher than that of typical scanline rendering methods, but at a greater computational cost. This makes ray tracing best suited for applications where the image can be rendered slowly ahead of time, such as in still images and film and television visual effects, and more poorly suited for real-time applications like video games where speed is critical. Ray tracing is capable of simulating a wide variety of optical effects, such as reflection and refraction, scattering, and dispersion phenomena (such as chromatic aberration).
Actually my example of raytracing, is only an approximation, since you cannot ever know how real light reflects on a curved surface, since you need PI to calculate it, and PI is an irrational number.
And for that we have no clue what a photon is really. First of all if it travels at the speed of light it would have no mass? So why is it that photons have an impact on nature - heating things up, make them illuminate? Photons/phantoms, are the ones who shed light in our universe, thou we cannot define them.
It takes a photon about 100.000 years to penetrate the sun, and when it leaves the surface eventually, it will travel forever in the direction it escaped, dying upon impact.
So, photons exist as a wave of electromagnetism, or is it a wave of particles ? That imho, is the fundamental question.
If you follow the raytracer build in the videos, you will probably notice that PI is NEVER used..
Therefore you cannot say that light is a "packet" of particles.
Figure 02a shows pictorially the wave packet as a function of x (centering around xo) and the weighting function (centering around ko). A measurement on the wave packet will detect the particle at certain value of k. This is the Copenhagen Interpretation, which asserts that the wave function collapses to a single state in response to the measurement.
originally posted by: kloejen
Interesting. So light is not a particle, but in your thinking a wave of ... what ?
Electromagnetism? Then it has to be particles?