Computer designers have concentrated on technology using gallium arsenide instead of silicon because silicon:

cannot emit light and has speed limitations

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.

nope i prefer two because it is simpler, i don't like all the powers you get

explanation:

but that's my opinion

answer; the correct answer is (operating system);