Elementary Lessons in Heat, Light & SoundMacmillan, 1891 - 282 σελίδες |
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Σελίδα 121
... illuminating surface A. When a screen is placed behind B the shadow thrown upon it consists of a central umbra surrounded by a penumbra . The size of the latter increases as the screen is moved farther away from B ; when the screen is ...
... illuminating surface A. When a screen is placed behind B the shadow thrown upon it consists of a central umbra surrounded by a penumbra . The size of the latter increases as the screen is moved farther away from B ; when the screen is ...
Σελίδα 122
... from a sphere 2 inches in diameter . Calculate , approximately , the diameters of the umbra and penumbra cast on a screen 5 feet beyond the sphere . CHAPTER II PHOTOMETRY 7. Illuminating Power and Intensity of Illumina- 122 CH . I LIGHT.
... from a sphere 2 inches in diameter . Calculate , approximately , the diameters of the umbra and penumbra cast on a screen 5 feet beyond the sphere . CHAPTER II PHOTOMETRY 7. Illuminating Power and Intensity of Illumina- 122 CH . I LIGHT.
Σελίδα 123
... illuminating power is ten or fifteen times as great as that of the candle . In this country the standard of illuminating power is the amount of light given out by a candle of a certain weight burning at a certain rate.1 When we speak of ...
... illuminating power is ten or fifteen times as great as that of the candle . In this country the standard of illuminating power is the amount of light given out by a candle of a certain weight burning at a certain rate.1 When we speak of ...
Σελίδα 124
... illuminating powers . ( 2 ) Upon the distance of the surface from the source of light . 8. Law of Inverse Squares . — It is evident that the intensity of illumination diminishes when the distance increases . But it would not be correct ...
... illuminating powers . ( 2 ) Upon the distance of the surface from the source of light . 8. Law of Inverse Squares . — It is evident that the intensity of illumination diminishes when the distance increases . But it would not be correct ...
Σελίδα 125
... illuminating powers of different sources of light . One of the simplest methods of doing this is by means of the shadow photo- meter introduced by Count Rumford . In the following experi- ment we shall describe how to use the shadow ...
... illuminating powers of different sources of light . One of the simplest methods of doing this is by means of the shadow photo- meter introduced by Count Rumford . In the following experi- ment we shall describe how to use the shadow ...
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Elementary Lessons in Heat, Light & Sound Daniel Evan Jones Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Συχνά εμφανιζόμενοι όροι και φράσεις
A. W. VERRALL amount of heat angle of incidence Assistant Master beam boiling boiling-point bulb Cambridge candle centimetres CHEMISTRY coefficient coloured concave lens concave mirror condensation convex lens cooling cork distance diverge Edited ELEMENTARY English equal equation expansion experiment EXPT FASNACHT Fcap flame flask focal length front G. E. FASNACHT Geometrical grammes GREEK HISTORY Illustrated image is formed inches incident ray increases interval ISAAC TODHUNTER J. P. MAHAFFY latent heat lenses liquid LL.D M.A. Cr Mathematics melt mercury observer Owens College paper passes placed position pressure principal axis principal focus prism produced Prof Professor pulse radiation rarefaction ray of light real image reflected refracted ray revised School screen shown in Fig side sound source of light specific heat steam string surface temperature thermometer Translated TREATISE Trinity College University velocity vibration vibration-number volume water-vapour wire
Δημοφιλή αποσπάσματα
Σελίδα 26 - New Edition. Crown 8vo. $s. KEY TO PLANE TRIGONOMETRY. Crown 8vo. los. 6d. A TREATISE ON SPHERICAL TRIGONOMETRY. New Edition, enlarged. Crown 8vo. 4-?. 6d. PLANE CO-ORDINATE GEOMETRY, as applied to the Straight Line and the Conic Sections. With numerous Examples.
Σελίδα 47 - The National Government. Part II. The State Governments. Part III. The Party System. Part IV. Public Opinion. Part V. Illustrations and Reflections. Part VI. Social Institutions.
Σελίδα 54 - A GENERAL SURVEY OF THE HISTORY OF THE CANON OF THE NEW TESTAMENT DURING THE fIRST FOUR CENTURIES. Fourth Edition. With Preface on "Supernatural Religion.
Σελίδα 50 - EUROPEAN HISTORY. Narrated in a Series of Historical Selections from the Best Authorities. Edited and arranged by EM SEWELL and CM YONGE. First Series, 1003 — 1154. Third Edition. Crown 8vo. 6s. Second Series, 1088—1228. Crown 8vo. 6s. Third Edition. " We know of scarcely anything which is so likely to raise to a higher level the average standard of English education.
Σελίδα 9 - BLACKIE— GREEK AND ENGLISH DIALOGUES FOR USE IN SCHOOLS AND COLLEGES. By JOHN STUART BLACKIE, Professor of Greek in the University of Edinburgh.
Σελίδα 15 - Hales.— LONGER ENGLISH POEMS. With Notes, Philological and Explanatory, and an Introduction on the Teaching of English. Chiefly for use in Schools. Edited by JW HALES, MA, Professor of English Literature at King's College, London, &c. &c. Fifth Edition. Extra fcap. 8vo. 4*.
Σελίδα 23 - Prize Essay for 1877. 8vC. &r. 6d. SMITH— Works by the Rev. BARNARD SMITH, MA, Rector of Glaston, Rutland, late Fellow and Senior Bursar of St. Peter's College, Cambridge. ARITHMETIC AND ALGEBRA, in their Principles and Application ; with numerous systematically arranged Examples taken from the Cambridge Examination Papers, with especial reference to the Ordinary Examination for the BA Degree.
Σελίδα 12 - THE SEVEN KINGS OF. ROME. An Easy Narrative, abridged from the First Book of Livy by the omission of Difficult Passages; being a First Latin Reading Book, with Grammatical Notes and Vocabulary.
Σελίδα 47 - ARCHIBALD GEIKIE, FRS, Director-General of the Geological Survey of the United Kingdom. •THE TEACHING OF GEOGRAPHY. A Practical Handbook for the Use of Teachers. By Sir ARCHIBALD GEIKIE, FRS Cr. 8vo. 2s. •MAPS AND MAP-DRAWING. By WA ELDERTON. 18mo. Is. •GEOGRAPHY OF THE BRITISH ISLES. By Sir A. GEIKIE, FRS 18mo. Is.
Σελίδα 27 - ON THE ALGEBRAICAL AND NUMERICAL THEORY OF ERRORS OF OBSERVATIONS AND THE COMBINATION OF OBSERVATIONS.