query: Shadows and the path of photons?
positive_passages.docid: 149797
positive_passages.text: What determines the sharpness of a shadow?
negative_passages.docid: 147571
negative_passages.text: How does Fermat's principle make light choose a straight path over a short path?
negative_passages.docid: 50645
negative_passages.text: Is the following set (path) connected?
negative_passages.docid: 28724
negative_passages.text: How to avoid "completely" dark shadow using directional light (as Sun) ?
negative_passages.docid: 37941
negative_passages.text: Can light travel slower than the maximum?
negative_passages.docid: 77731
negative_passages.text: 'size' of a photon
negative_passages.docid: 88401
negative_passages.text: How is the amplitude of light related to number of photons?
negative_passages.docid: 154151
negative_passages.text: How do single photons travel from here to there
negative_passages.docid: 48690
negative_passages.text: Does a photon interfere only with itself?
negative_passages.docid: 74101
negative_passages.text: How is a vacuum able to propagate light?
negative_passages.docid: 26074
negative_passages.text: Seeing strange things in light
negative_passages.docid: 34626
negative_passages.text: How does the propagation of gravity work for photons?
negative_passages.docid: 26806
negative_passages.text: Virtual photons, what makes them virtual?
negative_passages.docid: 107970
negative_passages.text: Laser, wire, and a circle of light
negative_passages.docid: 9336
negative_passages.text: Shadows along edges of mesh in 3D View
negative_passages.docid: 128577
negative_passages.text: Intensity of light
negative_passages.docid: 3909
negative_passages.text: Does $E = mc^2$ apply to photons?