Polarizer

Definition and stakes

Portrait of John Henry Pepper John Henry Pepper,  The Boy's Playbook of Science

“ A tube provided with a polarizer of tourmaline, or a single-image Nicol prism, is invaluable to the look-out at the mast-head in cases where vessels are navigating either inland or sea water, where the presence of hidden rocks is suspected, because the polarizer rejects all the glare of light arising from unequal reflection at the surface of water, and enables the observer to gaze into the depths of the sea and to examine the rocks, which can only be perfectly visible by the refracted light coming from their surfaces through the water. ”
Source: Gutenberg

Portrait of Albert Abraham Michelson Albert Abraham Michelson,  Light waves and their uses (1902)

“ These two vertical vibrations form the two outer lines of the triplet, and it can be shown that the light is plane polarized by passing it through a polarizer. Those particles which are vibrating horizontally do not have their period of vibration altered by the field. Consequently we get a single line whose position in the spectrum is not changed, and which is plane polarized in a plane at right angles to that of the other two. ”
Source: Wikisource

Portrait of Sophie May Sophie May,  Little Pitchers

“ It was the first time Pollio had smiled that day; but it was such a funny speech from that mite of a girl! He would as soon have thought of leaning on a good-sized flower, say a honeysuckle.
[86]
“Why, Teddy couldn’t hardly carry me: he isn’t big enough,” said the poor boy, feeling suddenly that he was very heavy.
“Well, papa can carry you, and Nunky can carry you, and Dick.”
“Now, you stop! Do you s’pose I want to go pickapack all the time?” whined unhappy Pollio.
To comfort him, Posy took a glass of lemonade from the table, and raised it to his lips, and of course spilled it on his neck.
”
Source: Gutenberg

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