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Tag Archives: light
Night vision
The vision of human beings is well-adapted to daylight; the human eye has evolved to see in the range of wavelengths that are brightest in the spectrum of light that the Sun emits. The intensity of the light the Sun emits … Continue reading
Tagged eye, light, vision
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Triboelectric envelope
The triboelectric effect (the prefix tribo– comes from the Greek τρίβω for “rubbing” or “friction”) results in the creation of a charge difference between two surfaces: one becomes positive and the other negative. The difference in charge is neutralised when … Continue reading
Tagged friction, light, triboelectric
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Arbitrage at the speed of light
arb·it·rage n /ˈɑrbɨtrɑːʒ/ the practice of taking advantage of a price difference between two or more markets. The image most people have of stock markets is of men (and it is always men) in suits using hand signals and shoted verbal … Continue reading
Tagged arbitrage, communication, light, optics, trading
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Snow-covered UK seen from space
In January I posted an image from NASA’s MODIS satellite showing the UK covered in snow. I’m doing the same for the recent snow; these images were taken today (1st December) between 1110 and 1430. The problem with this image is … Continue reading
Tagged infrared, light, satellite, weather
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Optical phenomena
Environmental Graffiti has a great post about optical (light) phenomena; I’ve picked out a couple of my favourites: Crepuscular Rays Crepuscular rays are caused by the scattering of beams of light; beams created by an object such as a tree or a cloud. … Continue reading
Tagged light, optics, sky
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