Packet A: Bonus 1
The spiral grooves on a compact disk make them act as these devices, explaining their iridescence. For 10 points each:
[10m] Name these devices that, like prisms, are commonly used to separate light in a monochromator.
ANSWER: diffraction gratings
[10e] A grating prism combination called a grism keeps only light of a specific value of this quantity undeviated. This quantity symbolized lambda equals wave speed over frequency.
ANSWER: wavelength
[10h] This type of diffraction grating is grooved at a namesake angle to maximize diffraction in a specific order. A specific type of these gratings are used in the HARPS (“harps”) spectrograph for exoplanet hunting.
ANSWER: blazed gratings [or echellette (“eh-shell-ET”) gratings; accept blaze angle; accept echelle (“eh-SHELL”) gratings]
<Purdue, Physics> | Packet A - Brown A, Wisconsin A, Purdue, Maryland B
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 81 | 12.59 | 91% | 27% | 7% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| Guelph | Carleton University | 0 | 10 | 0 | 10 | E |
| McGill A | Toronto E | 0 | 10 | 0 | 10 | E |
| McGill B | Toronto C | 0 | 10 | 0 | 10 | E |
| McMaster A | Toronto B | 10 | 10 | 0 | 20 | ME |
| McMaster B | Western B | 0 | 10 | 0 | 10 | E |
| Ottawa | UBC A | 10 | 10 | 10 | 30 | MEH |
| Queen's | Waterloo A | 0 | 10 | 0 | 10 | E |
| Toronto F | Toronto D | 0 | 10 | 0 | 10 | E |
| Toronto G | Brock | 0 | 10 | 0 | 10 | E |
| Toronto Metropolitan | Western A | 0 | 10 | 0 | 10 | E |
| UBC B | Waterloo B | 0 | 10 | 0 | 10 | E |
| Western C | Simon Fraser | 0 | 10 | 0 | 10 | E |
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| California (North) | Main Site | ✓ | 3 | 16.67 | 100% | 67% | 0% |
| California (South) | Main Site | ✓ | 4 | 12.50 | 100% | 25% | 0% |
| Canada | Main Site | ✓ | 12 | 12.50 | 100% | 17% | 8% |
| Florida | Main Site | ✓ | 3 | 10.00 | 100% | 0% | 0% |
| Great Lakes | Main Site | ✓ | 5 | 22.00 | 100% | 80% | 40% |
| Lower Mid-Atlantic | Main Site | ✓ | 9 | 10.00 | 89% | 11% | 0% |
| Midwest | Main Site | ✓ | 8 | 11.25 | 88% | 25% | 0% |
| Overflow | Main Site | ✓ | 4 | 15.00 | 100% | 50% | 0% |
| South Central | Main Site | ✓ | 2 | 15.00 | 100% | 50% | 0% |
| Southeast | Main Site | ✓ | 7 | 10.00 | 71% | 14% | 14% |
| UK | Main Site | ✓ | 12 | 13.33 | 92% | 33% | 8% |
| Upper Mid-Atlantic | Main Site | ✓ | 8 | 10.00 | 75% | 13% | 13% |
| Upstate NY | Main Site | ✓ | 4 | 12.50 | 100% | 25% | 0% |