Cool Labs

Index of Refraction
Index of Refraction

The semicircular block is ideal for a first quantitative activity on refraction. When placed as in this activity, rays bend only when exiting the block, simplifying observations. Students will measure angles of incidence and refraction, and calculate the index of...

Reflection & Refraction
Reflection & Refraction

One day in my classroom…"My students were amazed by examples of colorful fiber optics but didn't understand how the light goes from one end to the other; even when bent. After testing various angles of laser light through water and...