For 10 points, identify this scientist whose namesake effect can be observed in vacuum between two uncharged conducting plates.
A 2013 experiment by Zou et al. measured a phenomenon named for this scientist using a silicon micromechanical chip. Odd functions of individual particle velocities satisfy this scientist's generalization of the Onsager reciprocal relations. The problem of finding S-matrix elements can be reduced to the problem of calculating traces of gamma matrices using this scientist's namesake (*) trick. He is the first alphabetical namesake of a phenomenon that implies a nonzero expectation value for baryon number in the chiral bag model of the nucleon and has magnitude per unit area of h-bar times speed of light times pi squared, divided by 240 times separation distance to the fourth power. For 10 points, identify this scientist whose namesake effect can be observed in vacuum between two uncharged conducting plates.
A 2013 experiment by Zou et al. measured a phenomenon named for this scientist using a silicon micromechanical chip.
Hendrik Brugt Gerhard  Casimir [accept  Casimir-Onsager reciprocal relations,  Casimir trick,  Casimir- Polder force, or  Casimir effect]