Optics Without MathematicsSociety for promoting Christian knowledge, 1883 - 124 páginas |
Dentro del libro
Resultados 1-5 de 26
Página 48
... Lenses . But if a lens with two convex and spherical surfaces would be the re- sult of an indefinite , or , as mathematicians speak , an infinite number of prisms arranged edge outwards as above , then if we were to make the prisms of ...
... Lenses . But if a lens with two convex and spherical surfaces would be the re- sult of an indefinite , or , as mathematicians speak , an infinite number of prisms arranged edge outwards as above , then if we were to make the prisms of ...
Página 50
... lens , which is the equi - convex slit in two . Now if we continue to push in , as it were , the flattened side , we ... convex surface has the shorter radius , its Ps , converging ( or diverging as you choose to take it ) the more ...
... lens , which is the equi - convex slit in two . Now if we continue to push in , as it were , the flattened side , we ... convex surface has the shorter radius , its Ps , converging ( or diverging as you choose to take it ) the more ...
Página 51
... convex ) , are so exactly the reverse of the corresponding convex lenses , that it will be a good exercise for you ... lens , and between the convex mirror and the concave lens ; as the convex lens , like the con- cave mirror , is the ...
... convex ) , are so exactly the reverse of the corresponding convex lenses , that it will be a good exercise for you ... lens , and between the convex mirror and the concave lens ; as the convex lens , like the con- cave mirror , is the ...
Página 52
... convex lens , and tracing the course of a ray through it — that is , of course , of any ray that can fall upon it . You will un- derstand that if it passes along the principal axis , coinciding with P , it suffers no refraction ...
... convex lens , and tracing the course of a ray through it — that is , of course , of any ray that can fall upon it . You will un- derstand that if it passes along the principal axis , coinciding with P , it suffers no refraction ...
Página 53
... convex lens of ordinary glass this will bring P PF out PF at about the distance of the radius , a convenient but accidental coincidence ; with a denser medium , as diamond , the focal length with the same radii would be shorter ; longer ...
... convex lens of ordinary glass this will bring P PF out PF at about the distance of the radius , a convenient but accidental coincidence ; with a denser medium , as diamond , the focal length with the same radii would be shorter ; longer ...
Otras ediciones - Ver todas
Términos y frases comunes
angles of incidence aperture axis beautiful called candle circle cloth boards colour concave lens concave mirror conjugate foci converging convex lens course crossing crystal crystalline lens curious curves dark direction dispersion distance Double Refraction edge equal angles equi-convex eye-lens Fcap feet focal image focal length form an image fraction front happens hole inches larger lenses look looking-glass magnifying power microscope minute moon Newtonian reflector NORTHUMBERLAND AVENUE object object-glass opposite optical parallel rays perfect perfectly picture plane mirror polarised position prism produce PROMOTING CHRISTIAN KNOWLEDGE properties of light proportion radiant radius rainbow ray passes reflected rays reflecting telescopes refraction retina reverse right angles seen shorter focus side sideways sine Sir EDMUND BECKETT spectrum speculum sphere spherical spherical aberration straight line suppose surface telescope thing tion turned undulations violet waves wonderful
Pasajes populares
Página 125 - ANCIENT HISTORY FROM THE MONUMENTS. This Series of Books is chiefly intended to illustrate the Sacred Scriptures by the results of recent Monumental Researches in the East. Fcap. 8vo, cloth boards, 2s. each. Assyria, -from the Earliest Times to the Fall of Nineveh. By the late GEORGE SMITH, Esq., of the British 'Museum.
Página 123 - The Stars in their Seasons. An Easy Guide to a Knowledge of the Star Groups, in 12 Maps.
Página 88 - Look upon the rainbow, and praise him that made it; very beautiful it is in the brightness thereof. It compasseth the heaven about with a glorious circle, and the hands of the Most High have bended it.
Página 123 - EVENINGS AT THE MICROSCOPE ; or, Researches among the Minuter Organs and Forms of Animal Life. By P. H. GOSSE, Esq., FRS A new edition, revised and annotated. Post 8vo Cloth boards 4 o FAN'S SILKEN STRING. By ANNETTE LYSTER, author of " Northwind and Sunshine,
Página 124 - CARE OF HEALTH. By the late EA PARKES, MD, FRS FOOD. By ALBERT J. BERNAYS, Professor of Chemistry at St. Thomas's Hospital. WATER, AIR, AND DISINFECTANTS. By W. NOEL HARTLEY, Esq., King's College. HEALTH AND OCCUPATION. By BW RICHARDSON, Esq., FRS, MD THE HABITATION IN RELATION TO HEALTH.