Quote:
Originally Posted by The Philpott
... I should imagine increasing the distance between yourself and the source reduces the exposure by three-quarters. (correct me if i'm wrong) ...
|
Once you're far enough away, in the so-called 'far field', doubling the distance between you and any conventional (not laser) light source does lower your exposure to a quarter of what it previously was.
But in the case of a distributed (i.e. laterally spread-out) source then things are more complex when you're relatively close to it, in the 'near field'. As a general rule doubling your distance doesn't then achieve as much of an exposure reduction as you might hope.
Cheers,
GJ