OMG! Credit Card Antenna Geometry is so cool + some PIN Probability

The world  has mostly agreed on the size of a credit card:

Credit cards today contain a microchip and aerial.

A credit card is dissolved in ACETONE (solvent found in some nail polish removers) to extract the chip & aerial in this BBC video.

 

OMG! The cardless chip still works to pay for coffee. But if you wanted cash you would still need the PIN.