A set of compatible items which will enable diffraction to be investigated with slits, gratings, pinhole spots and other obstacles.

The set comprises:

• 1 Set of six lenses: focal lengths -100, -50, +50, +100, +200 and +1000mm
• 3 Lens holders
• 1 Slide holder for 50mm square slides
• 1 Pinhole slide, 50mm square, with holes of 0.2, 0.1 and 0.05mm
• 1 Slide with single and double slits
• Set of six slides with 1, 2, 3, 4, 5, and 6 slits respectively
• 1 Set of three diffraction grating slides: 2 x 150 and 300 lines/mm
• 1 Air cell for refractive index of gases. Path length 75mm approx.
• 2 Microscope slides: 76 x 25mm
• 1 Glass scale: 200 x 25 x 6mm, scale 0 to 150 mm x 1mm
• 1 Support stand for glass scale
• 1 Slide, 50mm square with circular obstacles for Fresnel diffraction
• 6 Bead headed mapping pins and needle for Fresnel diffraction
• 1 Hologram (ready prepared)
• 1 Copy of Manual of School Laser Demonstrations

Lasers can be purchased separately:

• B8A46139 - Philip Harris Semi-Conductor Laser
• B8H83651 - Unilab Solid State Laser