Halo-What explanation methods are used in nature's weather forecast?

1.( 1) (brightness) (2) (color arrangement)

Sunlight consists of seven different colors of light.

Halo is formed by sunlight refracting through ice crystals in clouds.

Halo is the precursor of weather change.

5. Description method: Define and list graphics. Explain the differences and phenomena between long halo and short halo.

6.( 1) Explain the concept (2) Trace the history (3) Explain the reason (4) Explain the function.