Light-
Light travels extremely fast, the speed of light in a vacuum 186,000 miles per second. Light travels slower through different mediums such as glass, water and air. These mediums are given a refractive index to describe by how much they slow the movement of light. Glass has a refractive index of 1.5, meaning that lights travels through it at around 124,000 miles per second (200,000 kilometres per second). The refractive index of water is 1.3 while the refractive index of air is 1.0003, meaning that air only slightly slows down light. Light Reflection Light reflection is when light bounces off an object to create a reflection, if the object is flat the reflection will be at the same angle it hit the object. This is called specular reflection. Light Refraction - Refraction occurs when light passes across the boundary between 2 media. Refraction happens when light passes through an object, such as water or glass. When this happens the light bends, and there is a curve/bend. when refraction happens with a transparent object, something magical happens. |
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