Can someone explain this effect?

Question

I know it has to do with friction and heat and what not, but I'm wondering about the color of light on this. See, I put two pieces of tape together, and, in the dark, I pulled them apart. They produced a blue band of light at the point where they were being pulled apart. Why is the color of that blue?

Answer 1

It has to do with the gas make up of the air which is 70% nitrogen. If you could do the same experiment in a room or enclosed container filled with a different gas you would see a different color