A text-book on chemistry : for the use of schools and colleges . upon which Nature carries onher works among the molecules of matter. Common light, as has been said, originates in vibratorymotions taking place in every direction transverse to theray. With polarized light it is different; to gather anidea of the nature of polarized light, we must refer oncemore to the cord, Fig. 62, which, as has been said, servesto imitate common light when its extremity is vibratedvertically, horizontally, and in all intermediate positionsin rapid succession. But if we simply vibrate it up anddown, or right a
A text-book on chemistry : for the use of schools and colleges . upon which Nature carries onher works among the molecules of matter. Common light, as has been said, originates in vibratorymotions taking place in every direction transverse to theray. With polarized light it is different; to gather anidea of the nature of polarized light, we must refer oncemore to the cord, Fig. 62, which, as has been said, servesto imitate common light when its extremity is vibratedvertically, horizontally, and in all intermediate positionsin rapid succession. But if we simply vibrate it up anddown, or right and left, then it imitates polarized light;polarized light is, therefore, caused by vibrations trans-verse to the ray, but which are executed in one directiononly. What is the length of a wave of red and of violet light respectively?How can we ascertain the number of vibrations in a second ? On the un-dulatory theory, in what directions do the ethereal particles vibrate in thecase of common light 7 What is the case in polarized light ? 88 POLARIZATION UK F,v (59.
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