This candle has been burning for a few minutes and now I’m going to put the candle out and light it again using a match.

The candle was lit when the match reached the wick. But let us try a different way:

What happened now was that without the match reaching the wick, I managed to light the candle again. Let us do it one more time.

Why does this happen?

Because liquid wax rises by capillarity through the wick, and when it reaches the top of the wick it vaporizes and creates vaporized fuel around the wick.

When we suddenly blow the candle out, there is a column of white smoke, which is nothing more than fuel, or wax.

In reality, it should be vaporized fuel, however, when that vapor comes out of the wick, with the candle out, it gets in contact with cold air and condenses.

And so, what we see in this white smoke are actually droplets of wax that have condensed in contact with air. When we approach a match, we can produce vapor again, and through this vapor, the flame ignites the wick again.