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<blockquote data-quote="sjastro" data-source="post: 77452745" data-attributes="member: 352921"><p>Here is a thought experiment, suppose an individual needs to drive from their house to place of work in the shortest amount of time.</p><p>The problem is their house is located on a dry stretch of surface where they can drive fast but the place of work is located on a muddy slushy stretch of surface where driving fast is not possible.</p><p>Driving in a straight line means half of the journey is on the dry surface.</p><p></p><p>The question is what trajectory or route should be selected in order to minimize the travelling time.</p><p>The intuitive answer of driving in a straight line the shortest distance does not work as the other half of the journey in on the muddy surface which requires driving at a slower speed.</p><p>The answer is to select a trajectory that looks like this.</p><p></p><p style="text-align: center">[ATTACH=full]339218[/ATTACH]</p><p></p><p>Now let’s look at the refraction of light and note the similarities with the driver.</p><p></p><p style="text-align: center"><img src="https://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Refraction_photo.png/800px-Refraction_photo.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>The speed of light in air is greater than in glass and refraction occurs as light “selects” the trajectory where the travel time in the air and glass mediums is minimized.</p><p>I’m pretty sure you don’t understand the science behind this in which case by your logic since the driver who is an entity “which understand meaning” could be equally applied to a beam of light which has an infinite number of possible trajectories but selects only one where the travel time is minimized.</p><p></p><p>The understanding of why light behaves this way has its origins in a bitter argument between a couple of alpha males, Isaac Newton and a member of the dreaded <a href="https://en.wikipedia.org/wiki/Bernoulli_family" target="_blank">Bernoulli family</a>, the full understanding of which became apparent in late 18th century.</p><p>[URL unfurl="true"]https://www.math.purdue.edu/~eremenko/bernoulli.html[/URL]</p></blockquote><p></p>
[QUOTE="sjastro, post: 77452745, member: 352921"] Here is a thought experiment, suppose an individual needs to drive from their house to place of work in the shortest amount of time. The problem is their house is located on a dry stretch of surface where they can drive fast but the place of work is located on a muddy slushy stretch of surface where driving fast is not possible. Driving in a straight line means half of the journey is on the dry surface. The question is what trajectory or route should be selected in order to minimize the travelling time. The intuitive answer of driving in a straight line the shortest distance does not work as the other half of the journey in on the muddy surface which requires driving at a slower speed. The answer is to select a trajectory that looks like this. [CENTER][ATTACH type="full" alt="trip1.png"]339218[/ATTACH][/CENTER] Now let’s look at the refraction of light and note the similarities with the driver. [CENTER][IMG]https://upload.wikimedia.org/wikipedia/commons/thumb/8/85/Refraction_photo.png/800px-Refraction_photo.png[/IMG][/CENTER] The speed of light in air is greater than in glass and refraction occurs as light “selects” the trajectory where the travel time in the air and glass mediums is minimized. I’m pretty sure you don’t understand the science behind this in which case by your logic since the driver who is an entity “which understand meaning” could be equally applied to a beam of light which has an infinite number of possible trajectories but selects only one where the travel time is minimized. The understanding of why light behaves this way has its origins in a bitter argument between a couple of alpha males, Isaac Newton and a member of the dreaded [URL='https://en.wikipedia.org/wiki/Bernoulli_family']Bernoulli family[/URL], the full understanding of which became apparent in late 18th century. [URL unfurl="true"]https://www.math.purdue.edu/~eremenko/bernoulli.html[/URL] [/QUOTE]
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