Why do rainbows appear in sunny weather?

Only sunny days don't form rainbows, which are formed by sunlight in the air and refracted into water droplets. In addition to sunny weather, there must be some water vapor to form a rainbow. Sunny and humid weather may form a rainbow, but sunny and dry weather will not form a rainbow.

Rainbow: Rainbow, also called rainbow, is an optical phenomenon in meteorology. When the sun shines on the water droplets in the air, the light is refracted and reflected, forming an arched color spectrum in the sky, which is a common phenomenon after rain. Curved, usually semicircular. Rich and colorful. The most common sayings about seven-color light in East Asia and China (in descending order of wavelength) are red, orange, yellow, green, blue, indigo and purple.

Formation weather: 1, Chu Qing after summer rain.

2. When the weather is clear, a rainbow will also form near the fountain.

Picture appreciation: