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Books are displayed at eye level which make them easy for children to see and retrieve
order item code 52627)
which can be hit by hand or by using a beater
I was transferred to North America
Diffraction Kit, 9 slides 229806 Books are displayed at eyeDiffraction Kit 18 slides [B]Diffraction Kit 9 Slides. Six slides of 1 to 6 slits. Three gratings to match the slits [B]Diffraction Kit 18 Slides. Six slides of 1 to 6 slits. Three gratings to match the slits . Diffraction grating 80 lines mm . Diffraction grating 300 lines mm . Single slit Tapered . Double slit Tapered . Metal gauze 300 mesh . Circular apertures 1. 0, 0. 60, 1. 40, 0. 30mm nominal diameter . Hologram . 2 Polaroids