Question

The three things needed for the fire is Heat, fuel, oxygen

Here laser when focused on the paper it burns/ creates fire
so here no fuel is used ,but why it creates fire??????????

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Answer 1

Explanation:

Oxygen, heat, and fuel are frequently referred to as the "fire triangle." Add in the fourth element, the chemical reaction, and you actually have a fire "tetrahedron." The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.

Answer 2

the reason laser can burn is that the laser is well collimated , can be focused on a much smaller point and contain current when current flow it produces heat that's why the paper burn......