Question

Deviation from linearity in relationships between composition and this quantity occurs in its namesake “bowing.” The Kohn–Sham equations consistently underestimate the “fundamental” type of this quantity due to the derivative discontinuity. The Shockley–Queisser limit is the maximum of a plot of efficiency versus this quantity. This quantity (-5[1])can be tuned in perovskites by altering (10[2])halide concentrations, and tandem cells stack layers with different values of this quantity. Since the crystal momentum changes upon excitation, silicon has the “indirect” form of this quantity. This quantity determines the wavelength of an LED, and is around 3 electron volts for blue ones. (-5[1])Insulators have high values of, (10[1]-5[1])for 10 (10[1])points, (10[1])what (10[1])quantity, (10[2]-5[1])the energy range that separates “valence” and “conduction” electrons in a solid? ■END■ (10[2]0[4])

ANSWER: band gap [or energy gap; accept fundamental band gap or optical band gap or indirect band gap; prompt on gap]
<Physics>
= Average correct buzz position

Summary

2024 ACF Regionals @ Nebraska01/27/2024Y650%0%33%112.00
2024 ACF Regionals @ Imperial01/27/2024Y888%0%25%92.71

Buzzes

PlayerTeamOpponentBuzz PositionValue
Aswath KaraiMichigan State ARice A46-5
Jacob RobertsonOxford ACambridge A5310
Alexander BakerOxford BSheffield5310
Matthew WangUBC AIowa A98-5
Aisling SkeetDurham BKCL103-5
Ian DewanKielOxford C10310
Rachel BenthamCambridge BWarwick10510
Linus LuuCambridge CBristol10610
Akshay SeetharamClaremont ATexas A&M A10710
Dimitris KalafatisTexas A&M BSorbonne10810
Sam MooreDurham AEdinburgh10810
Taiga ClarkeImperial BImperial A108-5
Ryan HumphreyTexas AAppalachian State12110
Isaac OlsonUW AIowa B1210
Ryan DunnIowa BUW A1210
Grace EarlyIowa AUBC A1210
Haike LiuKCLDurham B1210
Michael MaysImperial AImperial B12110