Lens

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/lens

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 governing equation?Lensmaker's equation: 1/f = (n-1) (1/R1 - 1/R2)
2. What is the primary aberrations?Spherical aberration, chromatic aberration, coma, astigmatism
3. What is a lens and how does it help us see?A lens is a curved piece of glass that bends light. It can make tiny things bigger or help us see far‑away stars.
4. How do convex and concave lenses differ?Convex lenses are thicker in the middle and bring light together to make a real, upside‑down picture. Concave lenses are thinner in the middle and spread light apart, making a virtual image.

Refractive Index: A measure of how much light bends when entering a material.
Focal Length: The distance from the center of a lens to its focal point.
Optical Aberration: An imperfection in an image formed by a lens that causes distortion or blur.