During a total lunar eclipse, in which the moon passes entirely into the shadow of the earth as cast by the sun, the moon is not completely dark, but is often a deep red in color. The shade of red varies widely from one total eclipse to the other. Why? 1. During the sunset, the Sun transfers some red light to the moon. 2. The earth acts like a giant water drop because of its oceans, and the moon winds up 3. None of the world’s sacred holy books discuss this situation, so it must be forever a total mystery. 4. Low frequencies pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon. 5. High frequencies pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon. Solution 4) Some light from the sun passes through Earth\'s atmosphere and is bent toward the moon. Low frequencies (red is having low frequency and highest wavelength) pass more easily through the long grazing path through the Earth’s atmosphere to be refracted finally onto the moon. .