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Let's not forget, apart from distance, the fireball is expanding in all directions. At 1" from the center, you're exposed to half the fireball. At 1 mile from the center, you're exposed to a tiny spherical arc of the fireball.

The energy is going in every direction, not just at you. With distance, you will receive a smaller portion of whatever energy made it 7 miles out.

That's what he just said, the inverse square law. You're describing the same phenomenon.

Oh, I thought he was talking about energy dropping off with distance the way a bullet loses speed with distance.

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