Despite the apparent scale of the process, I see its relevance to my schoolwork (rather incredibly). Amphorous and crystalline silicon, the two most common substrates used in chip-making, are commonly prepared in school laboratories by students. In some ways, this is the ultimate application of mundane secondary-level chemistry.
NFC can trace its roots back to RFID, where radio waves are transmitted to a passive tag for tracking and identification. Such wireless technologies are based around two key properties of electromagnetic waves:
They travel in straight lines. GPS, LTE and HSPA+ use satellites to send and receive data packets to and fro subscribers. EM waves carry this data, and they travel in a straight line (sometimes bent by gravity) to the satellite. This ensures an efficient transfer of data as energy or electromagnetic pulses.
They transfer energy from one place to another. Data is transferred as energy. If EM waves did not transfer energy, they would be useless in transferring data.
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