Question
Kaiser, Squires, and Broadhurst proposed a method for measuring the “weak” form of this phenomenon. For 10 points each:
[10m] Name this phenomenon that can cause a “halo effect” called an Einstein ring when a source, object, and observer are aligned. A “micro” form of this phenomenon is used for exoplanet detection.
ANSWER: gravitational lensing [accept weak gravitational lensing or strong gravitational lensing or gravitational microlensing; prompt on gravity]
[10e] Einstein crosses are gravitationally lensed images of quasars, whose name derives from their emissions in this part of the spectrum. Wavelengths in this part of the spectrum are longer than those of microwaves.
ANSWER: radio [accept radio waves; accept radio frequency; accept quasi-stellar radio sources]
[10h] Observations of gravitational lensing in the Bullet Cluster provide evidence towards this theory and modified Newtonian dynamics. Many cosmologists uphold this theory that divides the universe into three components.
ANSWER: Lambda-CDM model [or Lambda cold dark matter model; prompt on dark matter or dark energy]
<Other Science>
Summary
| 2023 ACF Winter @ Columbia | 11/11/2023 | Y | 8 | 15.00 | 63% | 50% | 38% |
Data
| Columbia A | Yale C | 10 | 10 | 10 | 30 |
| Columbia B | Bard A | 10 | 10 | 10 | 30 |
| Penn B | Haverford | 0 | 0 | 0 | 0 |
| Penn A | Princeton B | 10 | 10 | 10 | 30 |
| Rutgers A | Princeton A | 0 | 10 | 0 | 10 |
| Rutgers B | Yale A | 0 | 0 | 0 | 0 |
| Cornell C | Vassar | 10 | 10 | 0 | 20 |
| Yale B | NYU B | 0 | 0 | 0 | 0 |