Green Diffraction Laser, optional accessory for the Diffraction Apparatus, Operating at 532 nm, it allows students to see and measure how diffraction patterns depend on light wavelength
Game Real Numbers Learning Center-Grade 6-9, features a Curriculum Mastery Game with 30 illustrated, topic-specific question cards; 1 laminated game board; and materials for four players; 4-panel and visual guide, Write-On/Wipe-Off activities
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