| 单词 | convex lens |
| 例句 | Although the Dutch version used two concave lenses, giving an upside-down image, Galileo used one convex lens and one concave lens, giving an upright image. The Scientists 2003-10-21T00:00:00Z The image formed is much like the one produced by a single convex lens. College Physics for AP Courses 2015-08-12T00:00:00Z Peering down the viewer’s small convex lens, I saw Jacobs — gangly, laughing, 17 — standing next to his white-haired grandmother, herself the picture of bourgeois Upper West Side elegance. The Many Lives of Marc Jacobs 2020-02-10T05:00:00Z A convex lens bends light rays inward, which results in the object being perceived as larger or closer. The Magnifying Effect of a Water Drop 2015-07-02T04:00:00Z When a piece of plate-glass is pressed against a slightly convex lens, or a watch-glass, a series of coloured rings is formed by reflected light, with a black spot in the centre. Heroes of Science: Physicists 2012-01-17T03:00:17Z On this principle coloured rings appear between a plane and a convex lens, in a little oil on the surface of water, and in bubbles made with soap and water. Heads of Lectures on a Course of Experimental Philosophy: Particularly Including Chemistry 2011-10-11T02:01:05.817Z The word lens derives from the Latin word for a lentil bean, the shape of which is similar to the convex lens in Figure 25.26. College Physics for AP Courses 2015-08-12T00:00:00Z Arrow magnified by a convex lens. a, b, Real arrow. Through Magic Glasses and Other Lectures A Sequel to The Fairyland of Science 2011-10-03T02:00:33.003Z I suppose that a contrary remedy must be applied to this defect; that is to say, a convex lens, L M, fig. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z According to Olbers, a concave and convex lens were first used in combination, to render objects less distant in appearance, in the year 1606. Astronomical Myths Based on Flammarions's History of the Heavens 2011-06-24T02:00:15.873Z The concentration into a focus is obtained through a perfectly-shaped, convex lens. Chapters of Bible Study A Popular Introduction to the Study of the Sacred Scriptures 2011-03-27T02:00:12.580Z A different type of image is formed when an object, such as a person's face, is held close to a convex lens. College Physics for AP Courses 2015-08-12T00:00:00Z If a beam of parallel light—such as light from the sun—be passed through a double convex lens L, Fig. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 The most common, is the double convex lens, D. This is thick in the middle, and thin at the edges, like common spectacles, or reading glasses. Conversations on Natural Philosophy, in which the Elements of that Science are Familiarly Explained 2011-07-12T02:00:28.027Z At one end of it paper was stretched, and at the other a convex lens was fitted in a hole, the image being viewed through an aperture at the top of the box. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" The irregularity of spacing has thus the effect of a convex lens, which accelerates the marginal relatively to the central rays. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" To use a convex lens as a magnifier, the object must be closer to the converging lens than its focal length. College Physics for AP Courses 2015-08-12T00:00:00Z Spherical aberration, however, may be entirely destroyed by combining a meniscus and double convex lens, as shown in Fig. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 With a convex lens of about an inch focus, look attentively at a silver seal, on which a cipher is engraved. Endless Amusement A Collection of Nearly 400 Entertaining Experiments To view objects at a distance, a less convex lens is needed than in examining articles very near the eye; and this organ, from its structure, has the power of adaptation to different distances. A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition) The convex lens makes a clear image and it is the only kind of lens that will do this. Common Science Virtual images are larger than the object only in case 2, where a convex lens is used. College Physics for AP Courses 2015-08-12T00:00:00Z If in this enlarged hole we place a double convex lens, LL, Fig. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 The chromatic combination consists of a convex lens of crown backed by a concave, or plano-concave, lens of flint. Pleasures of the telescope An Illustrated Guide for Amateur Astronomers and a Popular Description of the Chief Wonders of the Heavens for General Readers A convex lens is among the usual appendages to the tobacco pipe. Travels in China, Containing Descriptions, Observations, and Comparisons, Made and Collected in the Course of a Short Residence at the Imperial Palace of Yuen-Min-Yuen, and on a Subsequent Journey through the Country from Pekin to Canton And that is why you can set fire to things by holding a convex lens in the sunlight so that the light and heat are focused on something that will burn. Common Science But a more common arrangement is to use a third convex lens as an eyepiece, increasing the distance between the first two and inverting the image once again as seen in Figure 26.24. College Physics for AP Courses 2015-08-12T00:00:00Z The distortion of an image formed by a convex lens is shown by the diagram, Fig. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 B is a double convex lens, which has a focal length of twenty inches. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The convex lens is that used to correct farsightedness. The Home Medical Library, Volume II (of VI) A convex lens is not the only thing that can magnify. Common Science A telescope can also be made with a concave mirror as its first element or objective, since a concave mirror acts like a convex lens as seen in Figure 26.25. College Physics for AP Courses 2015-08-12T00:00:00Z In a double and equally convex lens of glass the focal length is equal to the radius of the spherical surfaces of the lens. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 When a lens is thicker at the middle than at the sides it is called a convex lens; when thinner, a concave lens. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The crystalline humor, or lens, is situated immediately behind the aqueous humor, a short distance back of the pupil, and is a perfectly transparent double convex lens, closely resembling in shape the common burning glass. Popular Education For the use of Parents and Teachers, and for Young Persons of Both Sexes A convex lens brings light to a focus, and it also brings radiant heat to a focus. Common Science The convex lens shown has been shaped so that all light rays that enter it parallel to its axis cross one another at a single point on the opposite side of the lens. College Physics for AP Courses 2015-08-12T00:00:00Z The length of the image formed by a convex lens is to the length of the object as the distance of the image is to the distance of the object from the lens. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 Lenses—The image cast by a convex lens—Focus—Relative position of object and lens—Correction of lenses for colour—Spherical aberration—Distortion of image—The human eye—The use of spectacles—The blind spot. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use D'Acquapendentus' bottle has given way to the convex lens, and to concave, spherical, and parabolic mirrors, etc. Scientific American Supplement, No. 488, May 9, 1885 The kind of lens we have been talking about is the convex lens. Common Science For example, if a point light source is placed at the focal point of a convex lens, as shown in Figure 25.29, parallel light rays emerge from the other side. College Physics for AP Courses 2015-08-12T00:00:00Z While a real image formed by a convex lens is always inverted and smaller than the object, the virtual image is always erect and larger than the object. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 So we place in front of our lens a second convex lens which shortens its principal focus; so that in effect the box has been racked out sufficiently. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use Then, as she gradually moved from behind the Earth, her appearance was magnified by the convex lens formed by the atmosphere, bent over that planet. Pharaoh's Broker Being the Very Remarkable Experiences in Another World of Isidor Werner A magnifying glass, or convex lens, if put in the right place, will do this. Common Science Figure 25.29 A small light source, like a light bulb filament, placed at the focal point of a convex lens, results in parallel rays of light emerging from the other side. College Physics for AP Courses 2015-08-12T00:00:00Z Let L represent a double convex lens, with an object, AB, placed between it and the point F, which is the principal focus of the lens. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 The convex lens is placed in the more outward position in the telescope, i.e. the light passes first through it. On Laboratory Arts A double convex lens three feet in diameter is worth $60,000. Pushing to the Front Everybody knows, of course, that a convex lens in the right position makes things look larger. Common Science On the right the image is formed by a double convex lens; on the left by the lenses of the eye. Physiology and Hygiene for Secondary Schools Such concentration may be achieved by means of a convex lens or a concave mirror. Artificial Light Its Influence upon Civilization The convex lens of the eye-piece was carried not by a tube properly so called, but by four rigid fine wires placed at right angles. Biographies of Distinguished Scientific Men But even if the image formed by the object-glass were perfect, yet this image, viewed 14through a single convex lens of short focus placed as in fig. Half-hours with the Telescope Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction. For practical purposes it is not necessary to understand how a convex lens magnifies; the important thing is the fact that it does magnify. Common Science With a convex lens, in a darkened room, focus the light from a candle flame so that it falls on a white screen and forms an image of the candle. Physiology and Hygiene for Secondary Schools In the actual apparatus the sphere is an ordinary round-bottomed flask about 95 mm. in diameter, and the lens a simple double convex lens of about 90 mm. focal length. Scientific American Supplement, No. 483, April 4, 1885 A double convex lens, G, is fitted in a brass tube which should have a sliding fit in another shorter and larger tube fastened to the end of the box. The Boy Mechanic: Volume 1 700 Things for Boys to Do C is a frame for holding the negative, on the opposite side of which is a double convex lens facing the light. Scientific American Supplement, No. 586, March 26, 1887 First, you should realize that the image formed by a convex lens is not always larger than the object. Common Science The convex lens—as since developed into the microscope, the giver of a new world to man—was known to Archimedes only as an instrument to burn the enemy's fleet. The Atlantic Monthly, Volume 08, No. 47, September, 1861 To him, and apparently to him only, among all the inquiring spirits of the time, were known the properties of the concave and convex lens. Memoirs of Extraordinary Popular Delusions — Volume 3 So named from the resemblance in shape of a double convex lens to the seed of a lentil. The Gutenberg Webster's Unabridged Dictionary Section I, J, K, and L Having the form of a double convex lens. The Mysterious Island A jeweler wears a convex lens on his eye when he works with small objects. Common Science A man's mind was meant to receive as a mirror, not to concentrate rays like a convex lens! Home Again Possibly I inherit my aunt's tendency to magnify into extraordinary proportions trifles which I look at through the double convex lens of a personal interest. The Atlantic Monthly, Volume 02, No. 10, August, 1858 A convex lens may be needed to aid the failing power to increase the convexity of the lens, and to assist it in bringing the divergent rays of light to a focus. A Practical Physiology How can she lay her glasses down, And say she reads as well, When, through a double convex lens, She just makes out to spell? The Humorous Poetry of the English Language; from Chaucer to Saxe How can she lay her glasses down, And say she reads as well, When through a double convex lens, She just makes out to spell? Selections from American poetry, with special reference to Poe, Longfellow, Lowell and Whittier Then with an expression of interest he laid down his cigarette, and carrying the cane to the window, he looked over it again with a convex lens. The Hound of the Baskervilles He balanced the watch in his hand, gazed hard at the dial, opened the back, and examined the works, first with his naked eyes and then with a powerful convex lens. The Sign of the Four The knowledge of lenses seems to be very ancient, if we may judge from the convex lens of rock crystal found by Layard in his excavations at Nimrud. A History of Science — Volume 2 The convex lens found at Nimroud shows that they were not unacquainted with magnifying instruments. History of the Conflict Between Religion and Science |
| 随便看 |
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。