This traditional Ray box has three openings, two of which can be used simultaneously by two sets of pupils. The two side openings each havetwo slots for accommodating blanking plates, 50 mm slide accessories. A front opening provides seven grooves for accessories and lenses which have been designed so that when used with a biconvex cylindrical lens of 75 mm focal length, divergent or convergent rays are obtained through the slit plate. Only a minimum of accessories are needed to cover a wide range of optics experiments.

Includes:

• Ray box
• 2 meter of flex
• 2x 4mm plugs
• 12V - 24W B15 bulb
• Bulb holder
• Slit plate
• 2x aluminium blanking plates