Summer Vacation Science Project: Ready to Do Right Away ■ Making a Rainbow ■ Recreates the sky, raindrops, and the sun. ■ You can make a rainbow using a flashlight, smartphone light, or sunlight. ■ Perfect for elementary school science projects. ■ Tips for Making a Rainbow Rainbows are originally seen with light at an angle of 40-45 degrees. The appearance rate of the rainbow increases when light is shone from an angle rather than directly. Try experimenting with various angles. ★ How Rainbows Appear ★ A rainbow is an optical phenomenon that occurs when sunlight (a flow of particles called photons) hits raindrops. 1. Photons (light particles) from the sun refract when they enter a raindrop. 2. They reflect once inside the raindrop and refract again when they exit. 3. At this time, the angle of refraction differs slightly for each color, so white light (photons) separates into the seven colors: "red, orange, yellow, green, blue, indigo, and violet." Red spreads out on the outermost side, and violet appears on the inside. Due to the difference in angles, the colors line up without mixing, forming an arc-shaped rainbow. In other words, a rainbow is "natural light that turns raindrops into tiny prisms." ■ You can summarize the mechanism of the rainbow along with your project like this. ■ Size: 30cm wide, 22cm long, 4mm thick ■ Materials Cardboard Drawing paper Spray adhesive Soda-lime glass spheres 0.3mm OPP bag Cellophane tape ⚠️ Caution The soda-lime glass on the surface has small particles, so touching it with bare hands may cause itching. Do not take it out of the OPP bag. If you touch it, wash it with running water.