Question
This wavelength names the telescope array in Chile that initially reported phosphine in Venus's atmosphere. For 10 points each:
[10h] Name this wavelength that, when multiplied by 2.9 kelvin, gives the constant in Wien's ("veen’s") displacement law.
ANSWER: one millimeter [or one mm; accept clear equivalents, like 0.1 centimeters or 0.1 cm or 0.001 meters or ten-to-the-negative-three m]
[10m] Millimeter astronomy with ALMA detects this compound in interstellar gas via its 2.6-millimeter line. This diatomic compound consists of the third and fourth-most-abundant elements in the Milky Way.
ANSWER: carbon monoxide [or CO]
[10e] ALMA's 66 dishes are combined by being treated as one of these devices by the ALMA correlator. The Michelson–Morley experiment was performed with one of these devices, which are the "I" in "LIGO."
ANSWER: interferometers [accept astronomical interferometers or Michelson interferometers or laser interferometers]
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Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2025 PACE NSC | 06/07/2025 | Y | 42 | 11.19 | 76% | 36% | 0% |