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Natural Sciences


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2017-02-06
[See also:
Upside down, round and round
Through the Looking Glass: Is the distinction between "real" and "virtual" image real?
]

Where should this thread be placed? Cognitive Sciences, along with my other threads about vision and other brain processes? Or by Physical Sciences, along with the countless myths on which contemporary science is built?

Light is a subjective phenomenon, only known to living creatures as far as we can tell. But it is also a physical phenomenon that stands at the basis of modern science. The way physicists understand light is since du Broglie (1925) the way they understand matter. From gravitational waves to an expanding universe, all depends on how we interpret light phenomena. To change the perception of light in science is to change science itself.
However tempting that maybe, my objectives are much less ambitious.

Allow me to start with a simple mirror and invite you to step inside with me. Who knows? Maybe we will encounter Alice in our journey. Just as long as w ... (read more)
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2017-01-23
https://ia800307.us.archive.org/13/items/treatiseonlight031310mbp/treatiseonlight031310mbp.pdf

[pagination is given as page number in pdf file/page number in original text]
Chapter One
The first lines sound very strange coming from the founder of wave theory since they consecrate the standing of the opposite view, Geometric Optics:
"As happens in all the sciences in which Geometry is applied to matter, the demonstrations concerning Optics are founded on truths drawn from experience." Huygens sees therefore no conflict between his new approach and Optics which are based on the behavior of particles of light. Einstein's wave-particle duality was certainly nothing new!
Huygens therefore does not doubt the validity of optical laws that say that light travels in straight lines, that the angles of incidence and reflection are equal or that refraction obeys the law of sines.
That is all and well, but what is the relation between those particles that make up light, and those waves that the same part ... (read more)
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