query: What's the logic behind light's following the longest path according to Fermat's Principle?
positive_passages.docid: 147571
positive_passages.text: How does Fermat's principle make light choose a straight path over a short path?
negative_passages.docid: 132106
negative_passages.text: Why does the speed of light $c$ have the value it does?
negative_passages.docid: 4350
negative_passages.text: Rotate a long bar in space and get close to (or even beyond) the speed of light $c$
negative_passages.docid: 147919
negative_passages.text: How does this optical illusion work?
negative_passages.docid: 126484
negative_passages.text: Why is $\Gamma\left(\frac{1}{2}\right)=\sqrt{\pi}$?
negative_passages.docid: 28488
negative_passages.text: I am confused about the idea that the speed of light is independent of the speed of the source of light
negative_passages.docid: 50645
negative_passages.text: Is the following set (path) connected?
negative_passages.docid: 143775
negative_passages.text: What's the intuition behind Pythagoras' theorem?
negative_passages.docid: 63952
negative_passages.text: Disproving: If $(\Gamma\vdash(\phi\,\lor\psi))$, either $(\Gamma\vdash\phi)$ or $(\Gamma\vdash\psi)$ is true
negative_passages.docid: 64508
negative_passages.text: Where exactly does energy quantisation come in for light?
negative_passages.docid: 34626
negative_passages.text: How does the propagation of gravity work for photons?
negative_passages.docid: 155392
negative_passages.text: When deriving $d\sin\theta=n\lambda$ are the light rays approximately parallel or actually parallel?
negative_passages.docid: 107970
negative_passages.text: Laser, wire, and a circle of light
negative_passages.docid: 56005
negative_passages.text: Speed of light travel
negative_passages.docid: 116578
negative_passages.text: Any Implications of Fermat's Last Theorem?
negative_passages.docid: 45888
negative_passages.text: Minkowski metric -- why does it follow from the constancy of the speed of light?
negative_passages.docid: 85774
negative_passages.text: Looking for the actual reason of refraction explained precisely without analogies