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書籍 ... and, consequently, the heat at the focus is to the common heat of the sun, as... の書籍検索結果
" ... and, consequently, the heat at the focus is to the common heat of the sun, as the area of the glass is to the area of the focus. Thus, if a lens, four inches in diameter, collect the sun's rays into a focus, at the distance of twelve inches, the image... "
An Easy Grammar of Natural and Experimental Philosophy: For the Use of Schools - 57 ページ
Sir Richard Phillips 著 - 1811 - 152 ページ
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Pocket Encyclopedia: Or, A Dictionary of Arts, Sciences, and Polite ..., 第 3 巻

Edward Augustus Kendall - 1811
...the sun'S rays hito a footn at the distance of 12 inches, the Image will not be ftiore than one tenth of an inch in diameter, the surface of this little...surface of the lens, and consequently the heat will be KiOO times greater at the focus than at the lens. Hence the construction of Common burning glasses,...

The Panorama of Science and Art: Embracing the Sciences of ..., 第 1 巻

James Smith - 1815
...into a focus at the distance of one foot, the image will not be more than one-tenth of an inch broad. The surface of this little circle is 1600 times less...than the surface of the lens, and consequently the density of the sun's rays within it is proportionately increased. It is not therefore Bunting lenses...

Universal Science Or the Cabinet of Nature and Art, Comprising Above ..., 第 1 巻

Alexander Jamleson - 1821
...into a focus at the distance of one foot, the mage will not be more than one-tenth of an inch broad. The surface of this little circle is 1600 times less...than the surface of the lens, and consequently, the sun's rays must be ten times den 324. If the rays of the sun dispersed over the surface of a glass,...

The Register of Arts, and Journal of Patent Inventions, 第 2 巻

Luke Herbert - 1825
...into a focus at the distance of one foot, the image will not be more than one tenth of an inch broad. The surface of this little circle is 1600 times less...than the surface of the lens, and consequently, the sun's rays must be ten times denser within that circle ; it is not therefore surprising that it burns...

A Grammar of Natural and Experimental Philosophy ...: With One Hundred ...

Sir Richard Phillips - 1826 - 214 ページ
...//IKS. If a lens four inches in diameter collect the sun's rays into a focus at the distance of twelve inches, the image will not be more than one-tenth...times greater at the focus than at the lens. Cor. I. Hence the construction of common burning-glasses, which are all double convex lenses. 2. Hence the...

A Grammar of Natural and Experimental Philosophy ...: With One Hundred ...

Sir Richard Phillips - 1826 - 214 ページ
...Jllus. If a lens four inches in diameter collect the sun's rays into a focus at the distance of twelve inches, the image will not be more than one-tenth...diameter, the surface of this little circle is 1600 limes less than the surface of the lens, and consequently the heat will be 1600 times greater at the...

The Literary and Scientific Class Book: Embracing the Leading Facts and ...

Levi Washburn Leonard - 1827 - 318 ページ
...sun's rays into a focus at the distance of twelve inches, the image will not be more than one tenth of an inch in diameter : the surface of this little circle is one thousand six hundred times less than the surface of the lens, and consequently the heat will be...

The Literary and Scientific Class Book: Embracing the Leading Facts and ...

Levi Washburn Leonard - 1830 - 320 ページ
...sun's rays into a focus at the distance of twelve inches, the image will not be more than One tenth of an inch in diameter : the surface of this little circle is one thousand six hundred times less than the surface of the lens, and consequently the heat will be...

Elements of Natural Philosophy: Embracing the General Principles of ...

Leonard Dunnell Gale - 1838 - 276 ページ
...Illustration. If a lens four inches in diameter collect the sun's rays into a focus at the distance of twelve inches, the image will not be more than onetenth of...1600 times greater at the focus than at the lens. Corollary 1. Hence the construction of common burning-glasses, which are all double-convex lenses....

The Boston School Compendium of Natural and Experimetal Philosophy ...

Richard Green Parker - 1838 - 213 ページ
...sun's rays into a focus, at the distance of twelve inches, the image will not be more than one tenth of an inch in diameter ; the surface of this little...1600 times greater at the focus than at the lens, t 617. The following effects result from the laws of refraction, stated in No. 593 ; and, first, with...




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