[pezezin]

> A photon's wavelength at near UV is 400 nanometers, but the transistors in a smartphone are measured at 7 nanometers ish.

Not really, "7 nm" is just a marketing name, the actual transistors are around 50 nm:

https://en.wikipedia.org/wiki/7_nm_process

[mattashii]

It's true that the transistors are on the order of 50nm, but the conduits for getting the electrons to those transistors are presumably a bit smaller than that.

Probably not 7nm small, but not the full 50 nm either.