Quote from: OP
how does light on the right hand side of a flame know to go one way and light on the other side know to go the other way ?A sensible sheep will not try to walk through a fire.
But photons are fearless, and will travel in every possible direction.
Some photons do make it through a candle flame from the far side .
- Outside the candle, air is cool and clear, so light from the near side has an unobstructed path to your eye
- But a photon from the far side has to pass through a hot maelstrom of unstable reaction products, which are more likely to absorb it, and then reradiate the energy from a closer point
- Some photons do make it all the way through the candle flame - but they are hard to see against the brightness of the nearer side
PS: Is there such a thing as a sensible sheep?
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