The answer would be A.
The rest seem impractical.
Short answer, you don't. Modern Processors are made up of billions of transistors and are built in multi million dollar factories that have equipment just for that purpose.
Is this the full question?
Answer:
The answer is Frequency Spectrum.
Explanation:
The frequency spectrum is range of all component frequencies.It contains all the waves which are as following:-
Gamma Rays
X-Rays
Ultraviolet
Visible light.
Infrared
Micro wave
Radio wave
These all waves have their range of frequencies.The waves that are visible to us is only the visible light.