Balfour's Law

Balfour's Law describes how the brightness of the sun's corona (the outer atmosphere visible during a solar eclipse) diminishes with distance from the sun’s surface. It states that the brightness decreases roughly proportionally to the inverse cube of the distance, meaning if you move twice as far from the sun, the corona appears about eight times dimmer. This law helps scientists understand the structure and density of the solar corona and is useful in modeling solar phenomena. Essentially, it quantifies how the intensity of the corona’s light drops off as you move away from the sun.