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International Day of Light 2023

Essential to life, yet hard to perceive On International Day of Light, what does the word light mean to you?

From scientific experiments to casual encounters, photons sure know how to make up a good show.

Simple but complex. Colorless but multicolored.

photons • wavelength • particle • wave • rainbow • photosynthesis • sunset

• energy •

International Day of Lights is an UNESCO initiative occurring on May 16th, the anniversary of the first successful operation of the laser in 1960.


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