I want to know the answer to the following question:
A lens with a setting of f/1.4 lets how much to hit the focal plane compared with a setting of f/2?
All the background I'm provided with is that "The effective f-number is proportional to the ratio between the lens focal length and aperture diameter, the diameter itself being proportional to the square root of the aperture area.". Is that enough to answer the question?
Answer: no