| 单词 | photometer |
| 例句 | Her musical language is too cool, too probing and too subtle to let Emerson get away with a hopefully bright line like "We are all photometers." L.A. Philharmonic breathes fire into Saariaho world premiere 2015-05-15T04:00:00Z Euclid also has a near-infrared spectrometer and photometer for measuring each galaxy’s redshift, or the wavelength-stretching effect that occurs in light arriving from the faraway cosmos. How to Watch SpaceX Launch the Euclid Mission to Study the Dark Universe 2023-07-01T04:00:00Z He just needed a photometer 1000 times more sensitive than any available. NASA’s planet-hunting space telescope nears its end 2018-10-17T04:00:00Z Earth appears so bright because Kepler's light-sensing photometer is exquisitely sensitive. You Are Here: Earth Shines in Image from Kepler Spacecraft 2018-03-09T05:00:00Z For each sample, I use a refractometer, which measures moisture content, a pH meter for acidity, a honey color photometer, and other instruments that measure acidity and viscosity. Separating the Good Honey From the Bad 2017-12-29T05:00:00Z "It uses what we call feature extraction technology - something we have trademarked - and it breaks it down to the very pixel level, and it's sort of like a photometer," says Gauss Surgical boss, Milton McColl. The apps giving hospitals a cutting edge - BBC News 2015-07-06T04:00:00Z Using an instrument called a photometer, which measures brightness very accurately, researchers can detect those dips and—from their duration and frequency—can deduce the size of the exoplanet and its orbit. New exoplanet hunter opens its eyes to search for super-Earths 2015-01-14T05:00:00Z The machines, like the electronic nose or the laser-wielding robot that measures atmospheric ozone 10 kilometers up known as the sun photometer, constantly monitor air quality from 17 different sites. Oil Sands Raise Levels of Cancer-Causing Compounds in Regional Waters 2013-01-08T17:45:00.213Z The orbiting telescope’s photometer is able to detect that change. NASA Finds Planet Orbiting Binary Star System 2012-08-29T13:35:32Z This is a quantity almost imperceptible in the most delicate photometer. Astronomical Curiosities Facts and Fallacies 2012-03-27T02:00:18Z Pickering chose Polaris as a standard and devised the meridian photometer, an ingenious instrument of high accuracy, in which the light of a star is compared directly with that of the pole star by reflection. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z In fact we have an ordinary Rumford photometer, and the two shadows may be caused to touch one another by moving the rod towards or from the screen. Colour Measurement and Mixture 2012-02-27T03:00:13.987Z Prismatic Photometers.—Another exhibit was a photometer made of solid paraffin, or any other translucent substance, invented by Mr. J. Joly, of the University of Dublin. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z The photometer has played an important rôle in establishing the scientific basis of camouflage. Visual Illusions Their Causes, Characteristics and Applications 2011-06-02T02:00:25.247Z The instrument used at Harvard was a “meridian photometer,” constructed on the principle of polarization; while the “method of extinctions,” by means of a wedge of neutral-tinted glass, served for the Oxford determinations. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The photometer or instrument for accurate comparison of lights, their amount and intensity, tells a different story. Astronomy: The Science of the Heavenly Bodies 2012-03-17T02:01:02.630Z But even where the temperature is lowest the solar radiation produced by the rocks and snow is often so great as to raise the photometer to 120� and even higher. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide The atmospherical instruments were two electrometers, two of Daniel's hygrometers, Leslie's photometer and hygrometer, besides a good supply of mercurial and spirit thermometers of different sizes. Narrative of a Second Expedition to the Shores of the Polar Sea The photometer may show a very adequate intensity of illumination; nevertheless seeing may be unsatisfactory or even impossible. Visual Illusions Their Causes, Characteristics and Applications 2011-06-02T02:00:25.247Z The instrument employed was the "wedge photometer," which measures brightness by resistance to extinction. A Popular History of Astronomy During the Nineteenth Century Fourth Edition A valve is then fitted to one of the front openings, so that the light in that half of the photometer may be gradually diminished. A Color Notation A measured color system, based on the three qualities Hue, Value and Chroma By a good light the exposure on the shade does not exceed twenty minutes with a pretty intense transparency, and should be regulated with a photometer. Photographic Reproduction Processes The observations of visual magnitudes are performed almost exclusively with the photometer of Zöllner in a more or less improved form. Lectures on Stellar Statistics In such a case the photometer yielded results quite likely to be misinterpreted as satisfactory. Visual Illusions Their Causes, Characteristics and Applications 2011-06-02T02:00:25.247Z To measure this light he designed in 1844 another instrument, which in various modifications has come into extensive use—the grease-spot photometer. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" The Munsell photometer, which is briefly referred to, is an instrument of wide range, high precision, and great sensitiveness, and permits the valuations which are necessary in his system to be accurately made. A Color Notation A measured color system, based on the three qualities Hue, Value and Chroma The Photometer.—The time of exposure is regulated by means of a photometer. Photographic Reproduction Processes An instrument for measuring the strength of a light is called a photometer, and there are many different varieties, just as there are varieties of scales which measure household articles. General Science Prof. Zenger's differential photometer that we shall finally cite is an improvement upon Bunsen's. Scientific American Supplement, No. 421, January 26, 1884 Verily and indeed, no microscopes, spectroscopes, telescopes, photometers, or other physical apparatuses can ever be focused on either the macro-or micro-cosmical highest principles, nor will the mayavirupa of either yield its mystery to physical inquiry. Five Years of Theosophy His photometer was probably suggested by this appliance. Heroes of the Telegraph Of all the photometers which have been devised for that purpose we do not know any one more practical than that suggested in 1876 by Mr. J. Loeffler, of Staten Island. Photographic Reproduction Processes During the many years of lamp experimentation, batches of lamps were sent to the photometer department for test, and Edison would examine the tabulated test sheets. Edison, His Life and Inventions Second, the amount of illumination of each electric- box can be accurately measured by the use of a photometer. The Dancing Mouse A Study in Animal Behavior There is no other way of measuring the exposure than by the photometer or personal experience, and the latter is by far the best. Scientific American Supplement, No. 362, December 9, 1882 A number of measurements of the illuminating power of an electric lamp were rapidly made during the lecture with this photometer. Scientific American Supplement, No. 288, July 9, 1881 We are the photometers, we the irritable goldleaf and tinfoil that measure the accumulations of the subtle element. Essays — First Series |
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