In chemistry and physics, Dalton's law (also called Dalton's law of partial pressures) states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases. This empirical law was observed by John Dalton in 1801 and published in 1802 and is related to the ideal gas laws. Wikipedia, Dalton's law of partial pressures
The idea that a particle can be in two places at the same time comes from quantum mechanics, discovered in the early 1900s. In 1924, Louis de Broglie suggested that particles behave like waves. Then in 1926, Erwin Schrödinger created an equation showing that tiny particles like electrons don’t have a fixed position. They exist in a cloud of possibilities. This led to the idea of superposition: A particle can be in several states or locations at once until we observe it. When we look, measure, or detect it, the superposition “collapses,” and the particle chooses one position. This is why scientists say the quantum world doesn’t follow common-sense rules it follows probability, not certainty.
See Also
Additive and Subtractive Synthesis
constructive and deconstructive interference
Density
John Dalton
law of partial pressures
LAW OF SUPERPOSITION
Law of Supposition
Pressure
Sympathetic Association
Sympathetic Vibration
Sympathetic Oscillation
Sympathy