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The properties of light have been defined by international commissions in four kinds of units now in general use, depending on what properties are to be emphasized: radiometric units, based on the physical units, such as energy, and power, are used to describe the properties of electromagnetic waves or photons; photometric units, which refer to ...
- A Very Brief History of Light
We have come a long way from the earliest studies on light,...
- A Very Brief History of Light
From Leonardo to Oppenheimer, from candles to lasers, from cave drawings to cinema, from stonehenge to quantum mechanics, from Genesis to the Big Bang, light has filled our thoughts, our way of life, our aesthetics, our technology, and our means for survival. Richard Weiss leads us along these paths over the past 500 light years.
With the coming of the Scientific Revolution in the 16th and 17th centuries, optics, in the shape of telescopes and microscopes, provided the means to study the universe from the very distant to the very small. Newton introduced a scientific study also of the nature of light itself.
The author, writing for an audience of both students and other scientifically interested readers, describes fundamental investigations of the nature of light and ongoing methods to measure its speed as well as the emergence of the wave theory of light and the complementary photon theory.
14 Δεκ 2016 · We have come a long way from the earliest studies on light, trying to understand vision as light emanating from our eyes, to the description of light as rays, then as particles, and then waves, and finally exhibiting both particle and wave natures.
21 Οκτ 2024 · light, electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10 −11 metre to radio waves measured in metres.
14 Δεκ 2016 · A study of optics in the Western and Islamic cultures provides an understanding of the intellectual growth of these societies. This article attempts to retrace this history.
