Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books 1 - 10 of 27 on Yes ; the three glasses next the eye having their focal distances equal, the magnifying....
" Yes ; the three glasses next the eye having their focal distances equal, the magnifying power is found by dividing the focal distance of the object-glass by the focal distance of one of the eye-glasses. "
Of optics, magnetism, electricity, & galvanism - Page 151
by Jeremiah Joyce - 1815
Full view - About this book

An Easy Grammar of Natural and Experimental Philosophy: For the Use of ...

Sir Richard Phillips - Electricity - 1807 - 182 pages
...three eye glasses have all their focal distances equal, and the magnifying power is found as before, by dividing the focal distance of the object-glass by the focal distance of one of the eye-glasses. 277- The camera obscura is made by fixing a convex glass in a hole of a window shutter, and if no light...
Full view - About this book

Lectures on Experimental Philosophy, Astronomy, and Chemistry ..., Volume 1

George Gregory - Science - 1808
...the image may be seen upright. The magnifying power of this, which is called the dioptric telescope, is found by dividing the focal distance of the object-glass by the focal distance of the eye-glass, and the quotient expresses the magnifying power. The greatest inconvenience attending...
Full view - About this book

Scientific Dialogues: Intended for the Instruction and ..., Volume 5

Jeremiah Joyce - 1809
...that the former magnifies 48 times, and the latter 200 times. Tutor. Refracting telescopes for viewing terrestrial objects, in order to show them in their...eye-glasses. We have now said as much on the subject as is necessary to our plan. Charles. What is the construction of opera-glasses, that are so much used at...
Full view - About this book

Pocket Encyclopedia: Or, A Dictionary of Arts, Sciences, and ..., Volume 4

Edward Augustus Kendall - Encyclopedias and dictionaries - 1811
...glasses ef, gh, and t k. The three «ye.glasses have all their focal distances equal, and .therefore the magnifying power is found by dividing the focal...distance of the object-glass by the focal distance of either of the eye-glasses. The reflecting telescope may be thus described : Jet ab tig. 31, be a distant...
Full view - About this book

A pocket encyclopædia, or library of general knowledge

Edward Augustus Kendall - 1811
...glasses « f, gh, and > k. The three eyeglasses have all their focal distances equal, and therefore the magnifying power is found by dividing' the focal distance of the object-glass by the focal diftance of either of the eye-glasses. The reflecting telescope may be thus described : let ab fig....
Full view - About this book

An Easy Grammar of Natural and Experimental Philosophy: For the Use of Schools

Sir Richard Phillips - Celestial mechanics - 1811 - 160 pages
...three eye-glasses have all their focal distances equal, and the magnifying power is found, as before, by dividing the focal distance of the object-glass by the focal distance of one ot the eye-glasses. 275. The camera obscura is made by fixing a convex glass in a hole of a window...
Full view - About this book

Lectures on Experimental Philosophy, Astronomy, and Chemistry ..., Volume 1

George Gregory - Science - 1820
...the image may be seen upright. The magnifying power of this, which is called the dioptric telescope, is found by dividing the focal distance of the object-glass by the focal VOL. I. K distance of the eye-glass, and the quotient expresses the magnifying power. The greatest...
Full view - About this book

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

Sir Richard Phillips - Physics - 1826 - 214 pages
...three eye-glasses have all their focal distances equal, and the magnifying power is found as before, by dividing the focal distance of the object-glass by the focal distance of one of the eye-glasses. 195. Galileo's telescope consists of a convex objectglass'and a concave eye-glass,so placed that the...
Full view - About this book

The literary and scientific class book: embracing the leading facts and ...

Levi Washburn Leonard, John Platts - New Hampshire - 1827 - 318 pages
...will appear in an inverted position. The three eye-glasses have all their focal distances equal, and the magnifying power is found by dividing the focal...object-glass by the focal distance of one of the eye-glasses. The two additional lenses THE TELEGRAPH. 87 are not necessary for astronomical telescopes ; for no...
Full view - About this book

The literary and scientific class book: embracing the leading facts and ...

Levi Washburn Leonard, John Platts - Science - 1830 - 320 pages
...will appear in an inverted position. The three eye-glasses have all their focal distances equal, and the magnifying power is found by dividing the focal...object-glass by the focal distance of one of the eye-glasses. The two additional lenses *HE TELEGRAPH. 87 are not necessary for astronomical telescopes ; for no...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download EPUB
  5. Download PDF