Why do metals spark when struck together, like steel on flint?

When metals, especially those with high carbon content like steel, strike a hard material like flint, frictional force creates intense heat. This heat can raise tiny metal particles to their ignition temperature, causing them to oxidize rapidly in the air. The reaction produces visible sparks due to the energy released in the form of light.

Tags: #Friction #Oxidation #Ignition temperature #Combustion #Physics
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