Ray Track Apparatus

Includes A Ray Box With A 12V, 24W Bulb, Supplied Complete With A Cylindrical Convex Lens Of Focal Length About 75Mm And Two Double Slits, One Wide Beam Slit And One Each Of Single, Triple And Five Slits. Mounted On A White Painted Wooden Board With Non-Skid Rubber Feet And A Removable Turntable About 150Mm In Diameter With Two Orthogol Lines Along Its Diameter Dividing It Into Four Equal Quadrants. With A Circular Scale Graduated 90°-0°-90°-0°-90° x 1°. (Ray Track Apparatus)