Question
Have you ever noticed that light is not actually required for playing quizbowl? To rectify this, answer the following about light, for 10 points each.
[10e] Light is a wave traveling in this field. This field can be described by a rank-2 antisymmetric tensor field F, or, more simply, by two vector fields symbolized E and B.
ANSWER: electromagnetic field [or EM field or EMF; accept answers that contain both electric AND magnetic fields; prompt on partial answer]
[10h] The stress-energy tensor of an electromagnetic field is symmetric and has the property that this operation vanishes, meaning that the energy density minus the pressures is zero everywhere. This operation is written “T sub a sup a.”
ANSWER: trace [accept zero trace or traceless]
[10m] The time-space components of the stress-energy tensor, times c, describe this 3-vector. This vector field can be used to calculate the direction and intensity of a light beam, though it may need to be time-averaged over a cycle.
ANSWER: Poynting vector [prompt on S]
<RA, Physics>
Summary
| 2023 ARCADIA at Duke | Emory, Duke, Yale | Y | 4 | 5.00 | 50% | 0% | 0% |
| 2023 ARCADIA at Emory | Emory, Duke, Yale | Y | 4 | 10.00 | 75% | 0% | 25% |
| 2023 ARCADIA at Maryland | Maryland, Online | Y | 3 | 16.67 | 100% | 33% | 33% |
| 2023 ARCADIA at Ohio State | Ohio State, Texas | Y | 3 | 13.33 | 100% | 33% | 0% |
| 2023 ARCADIA Online | Maryland, Online | Y | 3 | 13.33 | 100% | 33% | 0% |
| 2023 ARCADIA at Texas | Ohio State, Texas | Y | 3 | 20.00 | 100% | 100% | 0% |
Data
| James Madison A | South Carolina B | 0 | 0 | 0 | 0 |
| South Carolina A | James Madison B | 10 | 0 | 0 | 10 |
| North Carolina B | NC State | 0 | 0 | 0 | 0 |
| Duke | North Carolina A | 10 | 0 | 0 | 10 |