Description: What would we see at the speed of light?, I Think Faster Than Light Travel is Possible. Here's Why., What does the speed of light look like on earth?, What If You Could Travel at the Speed of Light, Can we travel faster than the speed of light⁉️ Brian Cox #science #universe #physics
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The speed of light in vacuum , commonly denoted c , is a universal physical constant important in many areas of physics . Its precise value is 7008299792458000000♠ 299 792 458 metres per second (approximately 7008300000000000000♠ 3.00 × 10 8 m/s ), since the length of the metre is defined from this constant and the international standard for time . According to special relativity , c is the maximum speed at which all matter and information in the universe can travel. It is the speed at which all massles
The speed at which light propagates through transparent materials , such as glass or air, is less than c ; similarly, the speed of radio waves in wire cables is slower than c . The ratio between c and the speed v at which light travels in a material is called the refractive index n of the material ( n = c / v ). For example, for visible light the refractive index of glass is typically around 1.5, meaning that light in glass travels at c / 1.5 ≈ 7008200000000000000♠ 200 000 km/s ; the refractive index of a
In Conway's Game of Life (and related cellular automata ), the speed of light is a propagation rate across the grid of exactly one step (either horizontally, vertically or diagonally) per generation. In a single generation, a cell can only influence its nearest neighbours , and so the speed of light (by analogy with the speed of light in physics) is the maximum rate at which information can propagate. It is therefore an upper bound to the speed at which any pattern can move.