{"id":56416,"date":"2017-08-13T00:57:27","date_gmt":"2017-08-13T00:57:27","guid":{"rendered":"http:\/\/zenpundit.com\/?p=56416"},"modified":"2017-08-13T01:04:37","modified_gmt":"2017-08-13T01:04:37","slug":"polarized-light-pls-review-before-final-exam-thurs","status":"publish","type":"post","link":"https:\/\/zenpundit.com\/?p=56416","title":{"rendered":"Polarized light — pls review before final exam, Thurs"},"content":{"rendered":"

[ by Charles Cameron<\/strong> — actually the exam is daily, ongoing — and we’re not scoring very high marks ]
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Unpolarized light vibrates in any planes<\/strong>:<\/p>\n

A light wave that is vibrating in more than one plane is referred to as unpolarized light. Light emitted by the sun, by a lamp in the classroom, or by a candle flame is unpolarized light. Such light waves are created by electric charges that vibrate in a variety of directions, thus creating an electromagnetic wave that vibrates in a variety of directions. This concept of unpolarized light is rather difficult to visualize. In general, it is helpful to picture unpolarized light as a wave that has an average of half its vibrations in a horizontal plane and half of its vibrations in a vertical plane.<\/p>\n

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Polarized light vibrates in only one plane<\/strong>:<\/p>\n

It is possible to transform unpolarized light into polarized light. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization. <\/p>\n

The most common method of polarization involves the use of a Polaroid filter. Polaroid filters are made of a special material that is capable of blocking one of the two planes of vibration of an electromagnetic wave. .. In this sense, a Polaroid serves as a device that filters out one-half of the vibrations upon transmission of the light through the filter. When unpolarized light is transmitted through a Polaroid filter, it emerges with one-half the intensity and with vibrations in a single plane; it emerges as polarized light.<\/p>\n

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This works either way — so to speak, either vertically, or horizontally — though not, by definition, both at once. Ohh, and there’s paradox <\/strong>involved:<\/p>\n

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Read the whole lesson at The Physics Classroom: Polarization<\/a> — and memorize, remember?<\/p>\n

**<\/p>\n

Ali Soufan<\/strong> notices polarization in our political sphere wrt events we label or do not label terrorist:<\/p>\n

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Big difference in how President Trump reacted to the London Bridge and #Charlottesville<\/a> car attacks.<\/p>\n

— Ali H. Soufan (@Ali_H_Soufan) August 12, 2017<\/a><\/p><\/blockquote>\n