Shadow bands

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/shadow-bands

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the scientific principle?Atmospheric refraction of highly collimated sunlight from a solar crescent
2. What is the primary cause?Turbulence within Earth's atmosphere, characterized by variations in temperature, pressure, and humidity
3. Why do shadow bands look wavy?The waves form because the air in the sky moves in tiny currents that bend the sunlight, like many tiny prisms. The thin, straight light from the crescent makes even small bends show up as bright and dark stripes.
4. When can we see shadow bands during an eclipse?They are most visible just before and after the moment when the Sun is completely covered, when the crescent is very thin.

Collimation: The process of making light rays parallel, as occurs with the narrow solar crescent during an eclipse.
Atmospheric Turbulence: Irregular, chaotic air motion caused by thermal gradients and pressure differences, affecting light propagation.
Refractive Index: A measure of how much light bends when passing from one medium to another, varying with atmospheric conditions.