A good photographic print is obtained by an exposure of 2 second at a distance of 1 m from the lamp. How much time will be required to get equally good result at a distance 2 m from the same lamp?
Sahay Sir > Question Answers > A good photographic print is obtained by an exposure of 2 second at a distance of 1 m from the lamp. How much time will be required to get equally good result at a distance 2 m from the same lamp?
A good photographic print is obtained by an exposure of 2 second at a distance of 1 m from the lamp. How much time will be required to get equally good result at a distance 2 m from the same lamp? A good photographic print is obtained by an exposure of 2 second at a [...]
