Definitions for actinograph
actino·graph

WiktionaryRate this definition:0.0 / 0 votes

1. actinographnoun

   A recording actinometer

WikipediaRate this definition:0.0 / 0 votes

1. Actinograph

   An actinograph is an instrument for measuring or estimating the amount of light available, in terms of its ability to expose photographic film. That is, it measures the actinic or chemical intensity of light, as opposed to radiometric or photometric amount of light. The earliest actinographs were 24-hour recording devices, using a rotating cylinder of photographic paper exposed through a wedged-shaped slit to record a graph of actinic light during the period of a day; hence the graph suffix in actinograph. Such devices were developed and described by Robert Hunt, secretary of the Royal Cornwall Polytechnic Society in 1845, as an improvement on T. B. Jordan's 1839 Heliograph.In 1888, Ferdinand Hurter and Vero Charles Driffield patented a device for estimating the actinic power of sunlight and for computing exposure times and apertures for cameras, based on the plate speed, time of day, time of year, and latitude. These were slide rules, not measuring instruments, and did not produce a graph, but Hurter and Driffield adopted the same name for it. In 1911, Arthur William Clayden M.A. (Fellow of the Royal Meteorological Society and Principal of the Royal Albert Memorial University College of Exeter) developed a version of an actinograph for meteorologists, to observe and record the change of radiation.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Actinographnoun

   an instrument for measuring and recording the variations in the actinic or chemical force of rays of light

2. Etymology: [Gr. , , ray + -graph.]

WikidataRate this definition:0.0 / 0 votes

1. Actinograph

   An actinograph is an instrument for measuring or estimating the amount of light available, in terms of its ability to expose photographic film. That is, it measures the actinic or chemical intensity of light, as opposed to radiometric or photometric amount of light. The earliest actinographs were 24-hour recording devices, using a rotating cylinder of photographic paper exposed through a wedged-shaped slit to record a graph of actinic light during the period of a day; hence the graph suffix in actinograph. Such devices were developed and described by Robert Hunt, secretary of the Royal Cornwall Polytechnic Society in 1845, as an improvement on T. B. Jordan's 1839 Heliograph. In 1888, Ferdinand Hurter and Vero Charles Driffield patented a device for estimating the actinic power of sunlight and for computing exposure times and apertures for cameras, based on the plate speed, time of day, time of year, and latitude. These were slide rules, not measuring instruments, and did not produce a graph, but Hurter and Driffield adopted the same name for it. In 1911, Arthur William Clayden M.A. developed a version of an actinograph for meteorologists, to observe and record the change of radiation.

How to pronounce actinograph?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say actinograph in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of actinograph in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of actinograph in Pythagorean Numerology is: 4

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Actinograph
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Actinograph
3. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/actinograph
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=actinograph