Two 38 mm spherical lenses; one is a double concave, the other a double convex, each with a focal length of 150mm. When placed together the net focal length is zero. (1-1/2" x 1-1/2" x 1/4"; .005Ib).
Great for optics experiments in the lab or classroom.
A cool kit that helps you build your very own robotic arm!
View the glory of space with this hi-tech telescope set!
Great reference card for chemistry and physics students.
This science kit is an essential introduction to physics knowledge!
This glass Erlenmeyer mug makes an excellent gift!
This is a great clean heat demonstration model for the classroom setting!