Cool Labs

Refraction: Converging Lenses
Refraction: Converging Lenses

Students investigate images formed by converging lenses using the Light Box & Optical Set, and discover the Focal Point. Download Teacher Notes and Student Worksheets Required Equipment

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...

Law of Reflection of Light Pt. II
Law of Reflection of Light Pt. II

Observe objects through a periscope. Draw ray diagrams to explain image formation. Extend the activity by rotating one of the periscope mirrors and explaining the resulting inverted image. Required EquipmentPeriscope Download Teacher Notes and Student Worksheets Required Equipment

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...

Images Produced by Curved Mirrors
Images Produced by Curved Mirrors

Students use the Light Box and Optical Set's two different curved mirrors to investigate how light reflects from concave mirrors. Students make predictions and observations, and make generalizations about the focal point of a mirror, depending on its curvature. Download...

Color Addition and Subtraction
Color Addition and Subtraction

"Think red and green make brown? Only with paint and crayons! In color science, those colors of light make yellow. When I demonstrate that with the Color Mixing Spotlights, students discover there's no one answer for what color a strawberry...

The Fiber Optics Principle
The Fiber Optics Principle

Students discover that magic is really science… Students got so fascinated with air to water refraction that they raced ahead to explore other possibilities. One group called me over when they found that when the laser beam hit the water...

Color Addition
Color Addition

Students use the Light Box and Optical Set to observe the results of combining beams of colored light. Concepts include primary and secondary color addition and complementary colors. Download Teacher Notes and Student Worksheets Required Equipment Acknowledgements: Thank you to...

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...