query: What causes refraction of light?
positive_passages.docid: 23937
positive_passages.text: What is the mechanism behind the slowdown of light/photons in a transparent medium?
negative_passages.docid: 119516
negative_passages.text: What is the actual mechanism behind the reflection of various colored light by material of different color?
negative_passages.docid: 34053
negative_passages.text: How is the width of a slit related to the intensity of light passing through it?
negative_passages.docid: 107782
negative_passages.text: Does light reflect if incident at exactly the critical angle?
negative_passages.docid: 50771
negative_passages.text: What exactly are light waves?
negative_passages.docid: 86796
negative_passages.text: Why do waves diffract?
negative_passages.docid: 123588
negative_passages.text: What causes these streaked rays from light sources?
negative_passages.docid: 97032
negative_passages.text: Does light accelerate or slow down during reflection?
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: 117653
negative_passages.text: How does light travel?
negative_passages.docid: 145225
negative_passages.text: What is the amplitude of a light wave?
negative_passages.docid: 152064
negative_passages.text: Why does change in speed of a wave make it refract?
negative_passages.docid: 133022
negative_passages.text: What makes a rainbow happen?
negative_passages.docid: 49023
negative_passages.text: Why wave theory cannot explain photoelectric effect and provides evidence for particle nature of light?
negative_passages.docid: 128327
negative_passages.text: Why does light bend towards the normal when passing from a rarer to a denser medium?
negative_passages.docid: 10025
negative_passages.text: Why does wavelength change as light enters a different medium?
negative_passages.docid: 72913
negative_passages.text: Why does a light wave fade as it travels through space?