# Chapter 28 - Think and Discuss: 106

Both moon halos and rainbows are produced by light refracting from water (however, it's ice in the first case, liquid water in the second case).

#### Work Step by Step

A moon halo, also known as a moon ring or a $22^{\circ}$ halo, occurs when ice crystals refract moonlight into a circle. This is similar to how water droplets reflect and refract light into rainbows.

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