လေဆာရောင်ခြည်အလင်းတန်း Tank effectively demonstrates the laws of reflection and refraction. The 16 cm diameter acrylic water tank has a Degree scale and a moveable arm carrying a laser activated by a momentary switch. The sharp beam of light produced by the laser can be adjusted to pass the center of the scale. Batteries and activity guide are included. Please Note: This product emits laser light. Max. output power1mW. Wavelength - nm. Class II laser product.
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