If I were to use a gaussmeter to measure the strength of a magnet's magnetic field, would the value read be double if I were to stack two (of the same kind of magnets) on top of one another?
Magnetic fields from two sources add up as vectors at each point. So the strength of the field is not necessarily the sum of the strengths. In extreme case, the fields from two magnets can cancel at certain points.Why I was wondering is, I was looking at Magcraft's selection of magnets. Taking into account the differences in thickness, http://www.rare-earth-magnets.com/p-5-nsn0592.aspx" [Broken] of theirs are the strongest.
So if you were to stack them, and their magnetic fields add-up linearly, then they are stronger than individual singular magnets of a greater thickness.