Question

Using h to denote the gravitational potential, the Lagrangian for the graviton has terms proportional to h, h cubed, and h times this operation applied to h. This operation's associated Green's function equals a delta function of “t minus r over c” divided by 4 pi r. In the Lorenz gauge, applying this operation to the vector potential gives negative (-5[1])mu-nought times the current density. This (*) Lorentz-invariant operation is applied to a function to give zero in the most compact representation of the wave equation. It is defined as one over c squared times the second time derivative, minus the square of the gradient. Either a box or “box squared” symbolizes, for 10 points, what (10[1])operation named for a French physicist, the analogue of the Laplacian in Minkowski space? ■END■ (10[1])

ANSWER: d'Alembertian [or d'Alembert operator; accept quabla; accept box or box squared before “box”; reject “Laplacian” or “Laplace operator” or “nabla”]
<BB>
= Average correct buzz position

Back to tossups

Buzzes

PlayerTeamOpponentBuzz PositionValue
KrolMagisters LudiOxford Hornets59-5
EvanBroken Imperial NomadsBuzzers Karamazov11410
JacobOxford HornetsMagisters Ludi12910

Summary

2023 BHSU @ Maryland03/11/2023Y333%0%67%98.00
2023 BHSU @ Berkeley03/18/2023Y367%0%67%106.00
2023 BHSU Online04/15/2023Y475%0%50%105.00
2023 BHSU @ Sheffield04/15/2023Y2100%0%50%121.50
2023 BHSU @ Waterloo04/15/2023Y3100%0%67%114.00