Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← ScienceWhich risk increases when gallium arsenide photocathode's coating thins?
A)Thermionic emission reduces quantum efficiency✓
B)Auger recombination generates additional photons
C)Surface plasmons enhance light yield
D)Phonon scattering increases electron momentum
💡 Explanation
Increased gallium arsenide surface defect density due to coating defects allows increased energy states within the forbidden gap, leading to increased thermionic emission; thus quantum efficiency fails because emitted electrons are lost rather than contribute to desired signal.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Science →- Which mechanism limits the maximum efficiency of a thermoelectric generator converting a temperature gradient into electrical energy?
- Which mechanism causes increased fragility when polycrystalline aluminum exceeds its critical temperature?
- Which energy conversion impacts signal integrity in microstrip transmission lines?
- Which outcome occurs when a solenoid's turns are doubled?
- Which outcome occurs when throttling steam undergoes rapid expansion?
- Which consequence results when crystal lattice imperfections narrow existing electronic band gaps?