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Chains of these devices are used as multiplexers and demultiplexers in WDM systems. In one type of these devices, the quantity “pi times the square root of R all over one minus R” defines the finesse. Gyroscopes such as RLGs and FOGs are examples of these devices that operate using the Sagnac (“sahn-YAHK”) effect. A type of these devices called an etalon consisting of a cavity that filters out waves not in resonance is named for Fabry and Pérot. One of these optical devices consisting of a stone slab in a pool of mercury failed to detect a 0.04 fringe shift induced by the Earth’s motion. For 10 points, name these devices that split a beam of light and later recombine them to form patterns, which include one used to disprove the luminiferous aether in the Michelson–Morley experiment. ■END■
| California | 2025-02-01 | Y | 3 | 100% | 0% | 33% | 99.00 |
| Great Lakes | 2025-02-01 | Y | 5 | 80% | 0% | 20% | 88.25 |
| Lower Mid-Atlantic | 2025-02-01 | Y | 6 | 50% | 0% | 50% | 109.67 |
| Midwest | 2025-02-01 | Y | 6 | 100% | 0% | 0% | 64.83 |
| North | 2025-02-01 | Y | 3 | 33% | 0% | 67% | 97.00 |
| Overflow | 2025-02-01 | Y | 5 | 80% | 0% | 40% | 94.75 |
| Pacific Northwest | 2025-02-01 | Y | 2 | 50% | 0% | 50% | 52.00 |
| South Central | 2025-02-01 | Y | 2 | 100% | 0% | 0% | 77.00 |
| Southeast | 2025-02-01 | Y | 4 | 75% | 0% | 25% | 87.67 |
| UK | 2025-02-01 | Y | 10 | 90% | 0% | 10% | 92.67 |
| Upper Mid-Atlantic | 2025-02-01 | Y | 8 | 63% | 0% | 38% | 87.40 |
| Upstate NY | 2025-02-01 | Y | 3 | 67% | 0% | 33% | 104.00 |
| Player | Team | Opponent | Buzz Position | Value |
|---|---|---|---|---|
| Rasheeq Azad | UNC B | Liberty A | 39 | -5 |
| Matt Schiavone | Northwestern A | Georgetown B | 39 | 10 |
| Adam Fine | Chicago A | Chicago B | 43 | 10 |
| Alex Baker | Cambridge C | Cambridge E | 48 | 10 |
| Stan Melkumian | Purdue | Northwestern B | 52 | -5 |
| Matthew Wang | UBC | UW B | 52 | 10 |
| Andrew Wang | Illinois A | Indiana A | 53 | 10 |
| Rohan Dalal | Georgia Tech C | Alabama A | 54 | 10 |
| David Bass | Johns Hopkins A | Rutgers A | 55 | 10 |
| Yash Mandavia | Illinois B | Indiana B | 56 | 10 |
| Oscar O'Flanagan | Imperial A | Durham | 61 | 10 |
| Jacob Harl | Missouri S&T | Chicago D | 64 | 10 |
| Arya Karthik | Oxford A | Warwick B | 73 | 10 |
| Tom Scheri | RIT B | Binghamton A | 74 | -5 |
| Ryan Rosenberg | NYU A | John Jay College | 76 | 10 |
| Rohan Shelke | UC Berkeley B | UCSD | 77 | 10 |
| Yashwanth Bajji | Michigan A | Michigan State | 77 | 10 |
| Viraj Negandhi | Texas B | ASU | 77 | 10 |
| Karan Gurazada | Texas A | TAMU | 77 | 10 |
| Jack Lewis | Bruin A | Georgia Tech B | 77 | 10 |
| Shiv Seshan | Cambridge B | Cambridge D | 77 | 10 |
| Kai Madgwick | Manchester | Warwick A | 77 | 10 |
| Richard Niu | Cornell B | Columbia C | 77 | 10 |
| Alec Riso | Cornell C | RIT A | 77 | 10 |
| Calvin Bostleman | Ohio State A | Carnegie Mellon A | 81 | 10 |
| Charles Hang | WashU A | Illinois C | 82 | 10 |
| Swapnil Garg | UC Berkeley A | Claremont B | 83 | 10 |
| Coby Tran | Chicago C | Missouri | 91 | 10 |
| Samuel Li | William & Mary | Duke | 92 | -5 |
| Puna Ekka | Minnesota B | Wisconsin B | 92 | -5 |
| Rohan Navaneetha Raj | Ohio State B | Kenyon | 95 | 10 |
| Orion Keller | Virginia Tech A | South Carolina | 95 | 10 |
| Paige Crawley | Oxford B | Cambridge A | 95 | -5 |
| Alexandria Wyers | George Washington A | NYU B | 95 | -5 |
| Gus Vanskike | Maryland B | Penn B | 96 | -5 |
| Joseph Chambers | Virginia A | Wake Forest | 97 | 10 |
| JD Kroth | Iowa State | Winona State | 97 | 10 |
| Danny Han | Penn A | George Washington B | 97 | 10 |
| Monish Jampala | Georgia Tech D | Tennessee A | 98 | -5 |
| Olin Bose | Columbia B | Haverford B | 99 | -5 |
| Sai Subramanian | Case Western A | Case Western B | 100 | 10 |
| Andrew Zeng | Stanford B | Georgetown A | 100 | 10 |
| Brielle Rach | Iowa | Notre Dame B | 103 | 10 |
| Kevin Park | Claremont A | UCLA | 104 | -5 |
| Jack Lenga | Carnegie Mellon B | Michigan D | 104 | -5 |
| Anne Fjeld | Alberta | UW A | 110 | -5 |
| Andy Huff | LSE | Imperial B | 112 | 10 |
| Jonathan Bost | Liberty B | UNC C | 118 | -5 |
| Will Huang | Wisconsin A | Carleton | 119 | -5 |
| Matthew Amante | Notre Dame C | Notre Dame A | 122 | -5 |
| Cole Polley | Michigan D | Carnegie Mellon B | 123 | 0 |
| Andrew Fisher | Sheffield | Bristol | 124 | 10 |
| Cormac Stephenson | Southampton A | Oxford C | 125 | 10 |
| Pranaav Senthilkumar | Cornell D | ESF A | 131 | 10 |
| Parker McCoig | Tennessee A | Georgia Tech D | 132 | 10 |
| Leonard Castine | Penn B | Maryland B | 132 | 10 |
| Josh Schmidt | Liberty A | UNC B | 136 | 0 |
| Kaiser Xiao | UCLA | Claremont A | 137 | 10 |
| Michael Eng | UNC C | Liberty B | 137 | 10 |
| Nick Smemoe | UNC D | Liberty C | 137 | 0 |
| Jacob Egol | Duke | William & Mary | 137 | 0 |
| Alexandra Knight | Liberty C | UNC D | 137 | 0 |
| Alex Smits | Wisconsin B | Minnesota B | 137 | 0 |
| Aaron Marchand | Carleton | Wisconsin A | 137 | 0 |
| Stephen Walsh | Northwestern B | Purdue | 137 | 10 |
| Stephen Heritage | Notre Dame A | Notre Dame C | 137 | 0 |
| Anya Srinivasan | UW A | Alberta | 137 | 0 |
| Beckett Gilmore | Louisville A | Vanderbilt A | 137 | 0 |
| Brina Ratangee | Vanderbilt A | Louisville A | 137 | 0 |
| Jacob Hardin-Bernhardt | NYU C | Southampton B | 137 | 0 |
| Jaz the Mononymous | Southampton B | NYU C | 137 | 0 |
| Oscar Despard | Cambridge A | Oxford B | 137 | 10 |
| Kaiben Bennett | Haverford B | Columbia B | 137 | 0 |
| Ben Sterling | Yale A | Vassar A | 137 | 0 |
| Hrishit Chaudhuri | NYU B | George Washington A | 137 | 0 |
| Owen Linder | Binghamton A | RIT B | 137 | 0 |