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If a cave had 1 mirror at the mouth receiving sun, and a relay of mirrors going down into the cave, how far could the light travel?

Would the mirrors need to heat up to push light further?

If a cave had 1 mirror at the mouth receiving sun, and a relay of mirrors going down into the cave, how far could the light travel? Would the mirrors need to heat up to push light further?

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[–] • 2 pts

Most of the heat would be from the infrared spectrum if you're using standard mirrors, glass is opaque to IR.

[–] • 1 pt

Did not know that, thank you