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  1. Light : light can be behave as waves or particle. So far, no one can ever define the meaning of light . Light is an electromagnetic waves...frequency are red, orange, yellow, blue, indigo and violet. Light can be polarize, this means is when to polarizer...

  2. Light pollution, also known as photopollution or luminous pollution, is excessive...artificial light . Pollution is the adding-of/added light itself, in analogy to added sound, carbon dioxide, etc. Adverse..., with concernedpeople campaigning to reduce the amount of light pollution.

  3. According to a T5 lighting system producer, the "5" actually refers to the.... So T5 actually only means a light with a diameter of 5/8s of an inch.So why all the fuss...

  4. ...自然界中存在的一種強大的放電現象。 閃電的放電作用通常會產生了閃電光或電光( light )。 空氣中的電力經過放電作用急速地將空氣加熱、膨脹,因膨脹而被壓縮成電漿...

    分類:科學及數學 > 天氣 2007年03月31日

  5. ...no general relation. This actually depends on the type and design of the light bulb. The relationship between the brightness (luminous) of a light source and the power...

  6. ... in heat and only about 2-4% of electrical energy changed into light energy. As you notice the problem of energy waste is serious, you can choose...

  7. 攝影是光和影的結合,『光畫 - Light Painting』就是在照片上用光來繪畫。 拍攝方法...奇特顏色的照片。 當關上快門後,便可以得出『光畫 - Light Painting』照片了。 在網上用" light ...

    分類:視覺藝術 > 攝影 2009年09月15日

  8. The speed of light is different in different media doesnt concnern with relativity. In... and found to be equal to 3 x 10^8 m/s, the same as the speed of light obtained from measurements. From this result, the nature of...

  9. ... the current over the rated current, light bulbs and LEDs may burnt out, it may.... Since LED usually give out only light concentrates in a small part of light spectrum (i.e...

  10. A light -emitting diode, usually called a LED , is a semiconductor... a form of electroluminescence. A LED is usually a small area light source, often with optics added to the chip to shape its radiation pattern and...