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:
“Man always made, and still makes, grotesque blunders in selecting and measuring forces, taken at random from the heap, but he never made a mistake in the value he set on the whole, which he symbolized as unity and worshipped as God. To this day, his attitude towards it has never changed, though science can no longer give to force a name.”
—Henry Brooks Adams (1838–1918)