Answer: cannot emit light and has speed limitations
Step-by-step explanation:
Silicon is usually used in computer chips and solar cells but Gallium arsenide is regarded as a better alternative even though it's costly than silicon.
Gallium arsenide has technical advantages over silicon as its electrons
move through it faster than they move through silicon. Also, cannot emit light and has speed limitations.
Gallium arsenide is used in manufacturing devices like infrared light-emitting diodes, solar cells, optical windows, etc.