(20 13? As the third model of tianqiao district shows, it is a rare beauty in China-the strange and beautiful ice landscape of Hukou Waterfall on the Yellow River. Formed various waterfalls

(1) All kinds of sluices formed by waterfalls are formed by water solidification;

(2) In summer, after the rain clears, rainbows often appear in the sky. This is the refraction of sunlight through tiny water droplets suspended in the air. White light is divided into various colors after being refracted by water droplets. This phenomenon is called the dispersion phenomenon of light.

So the answer is: curing; Disperse.