The Light, Color, and Optics Kit is a complete laboratory for learning about light, color, and optical technology. Three 50-mm optics snap onto the track and slide easily. The light source makes a perfect illuminated “object” for optics experiments, and the fixed spacing of the colored LEDs makes it easy to observe and measure image properties such as magnification, inversion, and brightness.
https://www.pasco.com/products/lab-apparatus/light-and-optics/basic-optics/ep-3558#specs-panel
