Details:

• The metal box is double ended so that two sets of students can work independently with the same box and can perform different experiments in labs.
• Slide apertures are provided which accommodate color filters for color mixing experiments.
• The box is provided with a 12V 24W straight filament lamp fixed at the center of the apparatus while at each end is a sliding grooved frame to carry a convex cylindrical lens together with slit screen &/or filter.
• Long clear tracks to triple slit screen, two blank plates for closing side aperture when not in use & 1m of twin flex.
• Dimensions 308 x 63 x 115 mm high supplied without lenses, filters or other accessories.