Laser pens giving red, green and blue beams

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Laser pens giving red, green and blue beams

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Size: 5000px × 3550px
Location: uk
Photo credit: © DJG Technology / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: beam, beams, blue, color, colors, colour, colours, diode, green, laser, lasers, light, pen, pens, red, wavelength, wavelengths