|
Un article trouvé pour ce sujet.
 |
|
|
|
|
|
|
|
|
A cone of vision |
2014-04-29 |
|
David pose la question :
It is known that a fish in water looking up has a 97 degree "cone" of vision that sees "through" the surface of the water. If a fish lies 4 inches below the surface, the cone forms a window (circle) smaller than if a fish lies 8 inches below the surface. What is the ratio of inches of depth to the radius of the circle on the surface that is its visual window?
Penny Nom lui répond. |
|
|
|
