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GSC International LSP-SET-3 Laser Pointers Set of 3
Understanding and measuring wavelengths is an important subject in any physics class.
The set includes three laser pointers, and each has a different wavelength. The violet laser light has a wavelength of about 445 nanometers. The green laser light has a wavelength of about 532 nanometer
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The blue pointer hardly illuminates! Very disappointed. The red and green was good.