how do underwater flares (or matches) maintain a flame or light when they are surrounded by water?

Question

Just watched Crawl (2019) and got me thinking.

Edit: i should clarify, why do they not extinguish like a normal flame.

In: Technology

Answer 1

I just want to thank you for asking this. My question has always been ‘how can you weld underwater.’ This has now been answered. Thank you.