Refracting telescope

High school (ages 12+)
Science & Technology

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/refracting-telescope

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 key optical challenge?Chromatic aberration, requiring complex multi-element lens designs (achromats, apochromats) for high-quality imaging
2. How does a refracting telescope make an image?The big front lens gathers light, bends it, and creates a real, upside‑down picture that the eyepiece magnifies.
3. Why can refracting telescopes sometimes look blurry?Simple lenses focus different colors at slightly different spots, a problem called chromatic aberration, so scientists use multiple lenses to fix it.

Dioptric Telescope: An alternative name for a refracting telescope, emphasizing its use of lenses (dioptrics).
Chromatic Aberration: An optical distortion where a lens fails to focus all colors of light to the same point, causing color fringing.
Achromatic Lens: A lens system composed of two or more elements designed to correct for chromatic aberration.