Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of photometer.
Etymologies
Sorry, no etymologies found.
Examples
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Just a barely perceptible change in brightness, but observers interested in DSLR or photoelectric photometers may want to use this project as an entry point.
Journey Around A Black Hole – Epsilon Aurigae | Universe Today
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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.
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Even when allowance is made for the difficulties in determining illuminating power, especially when different photometers, different standards of light, and different observers are concerned, it will be seen that these results are too irregular to be altogether trustworthy, and that much more work must be done on this subject before the economy of the acetylene flame can be appraised with exactitude.
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Density can never be exactly learned; but strange to say, photometers measure the quantity of light that any bright body emits; hence the stars cannot have specific gravity very far different from that of the sun, since they send similar light, and in quantity obeying the law wherein light varies inversely as the squares of distance.
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We are the photometers, we the irritable goldleaf and tinfoil that measure the accumulations of the subtle element.
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The range is utilized for the highly accurate measurement of coloured and colourless liquids either in the laboratory o The PoolControl photometers from Lovibond® Tintometer® ensure accurate water testing every time and provide the answer to all requirements relating to the analysis of water used in modern swimming pools and baths.
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These include high-performance array and scanning spectrometers, imaging photometers and colorimeters.
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In both cases, the airborne data corresponded well with observations from ground-based photometers known to provide accurate aerosol measurements.
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Deploying more photometers was a logical and relatively low-cost way to start filling the gaps in knowledge.
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Early emphasis was placed on performing observations with the SPIRE and PACS imaging photometers as this also provided the opportunity to test the optics and pointing characteristics of the telescope.
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