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 and Refraction
Reflection and Refraction

The Law of Reflection states that the angle of incidence is equal to the angle of reflection. Students will use ray tracing to predict the location and image characteristics for flat and curved mirrors. Students will use ray tracing to...

Law of Reflection of Light
Law of Reflection of Light

This activity is designed to help students "discover" that light reflected form a mirror's surface is reflected in a systematic, predictable way such that the angle of incidence is equal to the angle of reflection. Download Teacher Notes and Student...