Circumhorizon Arc

The video explains the formation of halos and circum horizon arcs in cirrus clouds due to light bending in ice crystals. It highlights the differences between circum horizon arcs and rainbows, noting that arcs occur when the sun is high and in front of the observer, unlike rainbows. The visibility of these arcs depends on factors like cloud thickness and sunlight. Circum horizon arcs are more common in summer but require specific conditions to be visible.

What natural phenomenon is formed by light bending in ice crystals of cirrus clouds?

• A halo

• A tornado

• A thunderstorm

• A rainbow

What is a circum horizon arc?

• A straight segment of colors

• A type of halo

• A cloud formation

• A circular rainbow

How do the colors in a circum horizon arc appear?

• In a zigzag pattern

• With red on top

• With blue on top

• Randomly arranged

What is a key difference between a circum horizon arc and a rainbow?

• Circum horizon arcs are always visible

• Rainbows occur with the sun behind you

• Circum horizon arcs are circular

• Rainbows are only visible at night

When are circum horizon arcs most likely to occur?

• At night

• During winter

• In the morning

• In summer when the sun is high