E
EmmaJean
Guest
Given:
Camera A has a lens with an aperture diameter of 7.80 mm. It photographs an object using the correct exposure time of 3.33×10−2 s.
Question:
What exposure time should be used with camera B in photographing the same object with the same film if this camera has a lens with an aperture diameter of 23.5 mm? The lenses of cameras A and B have the same focal length.
I only have a couple more attempts at this problem.
& i can't seem to get an answer at all.
Any help would be greatly appreciated!
Camera A has a lens with an aperture diameter of 7.80 mm. It photographs an object using the correct exposure time of 3.33×10−2 s.
Question:
What exposure time should be used with camera B in photographing the same object with the same film if this camera has a lens with an aperture diameter of 23.5 mm? The lenses of cameras A and B have the same focal length.
I only have a couple more attempts at this problem.
& i can't seem to get an answer at all.
Any help would be greatly appreciated!