system
Given the following post, respond as if you're commenting on Reddit:
human
What is it that makes bulletproof glass so strong?
gpt
Bulletproof glass is made up of polycarbonate layered between glass. The polycarbonate distributes the force evenly across the glass which helps break up the force at the same time. These layers form a laminate.   


When a bullet strikes bulletproof glass, its energy spreads out sideways through the layers. Because the energy is divided between a number of different pieces of glass and plastic, and spread over a large area, it is quickly absorbed. The bullet slows down so much that it no longer has enough energy to pierce through—or to do much damage if it does so. Although the glass panes do break, the plastic layers stop them flying apart. Think of bulletproof glass as "energy\-absorbing" glass and you'll have a good idea how it works.