Q: Why is snow white? PATRICIA, 9
A: Single snowflakes appear clear, or translucent. A pile of snow appears white because of the way light reflects off its surface. A beam of light is made up of many colours, including red, violet, blue, green, and yellow. You might know this as a rainbow! Rainbows are visible to us because sunlight is refracted, or broken up into these separate colours, as it passes through millions of water droplets in the atmosphere. Snowflakes are made of microscopic ice crystals, which are perfect for reflecting light. When snowflakes are in a pile, it creates an uneven surface, which means that the light is reflected back at different angles. Light is scattered into the colours of the rainbow. But as they are scattered, they…