 ... about two inches and the eighth part of an inch, including the penumbra. For the image was eighteen feet and a half distant from the prism; and at this distance that breadth, if diminished by the diameter of the hole in the window-shut, that is by...  The Spectroscope and Its Work - Page 29by Hugh Frank Newall - 1910 - 163 pagesFull view - About this book
 | Isaac Newton - 1730 - 432 pages
...Diameter of the Hole in the Window-fhut, that is by a quarter of an Inch, fubtended an Angle at the Prifm of about half a Degree, which is the Sun's apparent...about eight Inches ; and the refracting Angle of the Prifm, whereby fo great a Length was made, was 64 degrees. With a lels Angle the Length of the Image... | |
 | James Wood - 1801 - 270 pages
...by a quarter of an inch, fubtended an angle at the prifm of about half a degree, which is the fun's apparent diameter. But the length of the image was...inches and a quarter, and the length of the rectilinear fides about eight inches; ancj • • Left. Opt. PI Prop. XXVr ', and the refracting angle of the... | |
 | 1841 - 488 pages
...of about half-adegree, which is the sun's apparent diameter. But the length of the image was abput ten inches and a quarter, and the length of the rectilinear...the prism, whereby so great a length was made, was C4°. With a less angle, the length of the image was less, the breadth remaining the same. It is farther... | |
 | Henry Enfield Roscoe - 1870 - 514 pages
...prism; and at this distance that breadth, if diminished by the diameter of the hole in the window-shut, that is by a quarter of an inch, subtended an angle...prism whereby so great a length was made was 64°. With a less angle the length of the image was less, the breadth remaining the same. If the prism was... | |
 | sir Henry Enfield Roscoe - 1869 - 396 pages
...inch, subtended mi angle at the prism of about half a degree, which is the sun's apparent diameter. Hut the length of the image was about ten inches and a...prism whereby so great a length was made, was 64°. With a less angle the length of tho image was less, the breadth remaining the same. If tho prism was... | |
 | sir Henry Enfield Roscoe - 1870 - 452 pages
...by a quarter of an inch, subtended an angle at the prism of about half a degree, which is the sun-s apparent diameter. But the length of the image was...prism whereby so great a length was made was 64°. With a less angle the length of the image was less, the breadth remaining the same. If the prism was... | |
 | Henry Enfield Roscoe - 1873 - 542 pages
...prism; and at this distance that breadth, if diminished by the diameter of the hole in the window-shut, that is by a quarter of an inch, subtended an angle...prism whereby so great a length was made was 64°. With a less angle the length of the image was less, the breadth remaining the same. If the prism was... | |
 | sir Henry Enfield Roscoe - 1873 - 550 pages
...; and at this distance that breadth, if diminished by the diameter of the hole in the window-shut, that is by a quarter of an inch, subtended an angle...prism whereby so great a length was made was 64°. With a less angle the length of the image was less, the breadth remaining the same. If the prism was... | |
 | Sir William Augustus Tilden - 1899 - 296 pages
...that breadth, if 1 Newton's "Opticks," Book i. diminished by the diameter of the hole in windowshut, that is by a quarter of an inch, subtended an angle...prism whereby so great a length was made was 64°. With a less angle the length of the image was less, the breadtl1 remaining the same. . . . Now, the... | |
 | Sir William Augustus Tilden - 1913 - 390 pages
...prism; and at this distance that breadth, if diminished by the diameter of the hole in the window-shut, that is by a quarter of an inch, subtended an angle...prism whereby so great a length was made was 64°. With a less angle the length of the image was less, the breadth remaining the same. . . . Now, the... | |
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