Measuring and Computing
The visual angle can be measured directly using a theodolite placed at point .
Or, it can be calculated using the formula, .
However, for visual angles smaller than about 10 degrees, this simpler formula provides very close approximations:
Read more about this topic: Visual Angle
Famous quotes containing the word measuring:
“As an example of just how useless these philosophers are for any practice in life there is Socrates himself, the one and only wise man, according to the Delphic Oracle. Whenever he tried to do anything in public he had to break off amid general laughter. While he was philosophizing about clouds and ideas, measuring a flea’s foot and marveling at a midge’s humming, he learned nothing about the affairs of ordinary life.”
—Desiderius Erasmus (c. 1466–1536)