A Treatise On Optics
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In our eReader you can find the full English version of the book. Read A Treatise On Optics Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Treatise On Optics
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(ii) If the field be limited by the small mirror let the ray PC after reflexion at C fall upon the edge of the small mirror, then of the pencil which falls upon the object-mirror from any point nearer to Q than P is, more than one-half reaches the eye.
If (^ = PCQ be the angular radius of the field of view thus defined, we have COR. If the breadths of the eye-glass and small mirror are such that the field of view limited by them severally is the same, then 1 since / and / are small compared wi...th F.
222. The telescopes have here been described in their simplest forms, for the purpose of explaining the principle of their construction. We proceed to notice briefly the defects PEFECTS OF TELESCOPES. 207 of such instruments which render their modification by com- pound object-glasses and eye-glasses necessary, whereby these defects are diminished while the principle of the telescope is unchanged.
223. I. The Astronomical Telescope.
(i) Let light be considered homogeneous.
What to read after A Treatise On Optics?
You can find similar books in the "Read Also" column, or choose other free books by S Parkinson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(ii) If the field be limited by the small mirror let the ray PC after reflexion at C fall upon the edge of the small mirror, then of the pencil which falls upon the object-mirror from any point nearer to Q than P is, more than one-half reaches the eye.
If (^ = PCQ be the angular radius of the field of view thus defined, we have COR. If the breadths of the eye-glass and small mirror are such that the field of view limited by them severally is the same, then 1 since / and / are small compared wi...th F.
222. The telescopes have here been described in their simplest forms, for the purpose of explaining the principle of their construction. We proceed to notice briefly the defects PEFECTS OF TELESCOPES. 207 of such instruments which render their modification by com- pound object-glasses and eye-glasses necessary, whereby these defects are diminished while the principle of the telescope is unchanged.
223. I. The Astronomical Telescope.
(i) Let light be considered homogeneous.
What to read after A Treatise On Optics?
You can find similar books in the "Read Also" column, or choose other free books by S Parkinson to read onlineMoreLess
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