Particles come in many forms. Some are very small, such as nanoparticles with dimensions of 1-100 nm and that might consist of just a few hundred atoms, and some are much larger. In this chapter we co...Particles come in many forms. Some are very small, such as nanoparticles with dimensions of 1-100 nm and that might consist of just a few hundred atoms, and some are much larger. In this chapter we consider methods for determining the size of particles.
This page discusses the mid-1920s development of the uncertainty principle by physicist Werner Heisenberg, which states that the precision of a quantum particle's position and momentum is inherently l...This page discusses the mid-1920s development of the uncertainty principle by physicist Werner Heisenberg, which states that the precision of a quantum particle's position and momentum is inherently limited. This principle reveals that decreasing uncertainty in one aspect increases it in the other, stemming from the wave nature of matter. An exercise included illustrates the differences in positional uncertainty between a baseball and an electron.
