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May 16 marks UNESCO’s International Day of Light, celebrating the anniversary of the development of the first laser, created from a ruby red crystal on this date in 1960.

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Celebrating the international day of light

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  • 发表日期：

    2025年

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摘要

May 16 marks UNESCO’s International Day of Light, celebrating the anniversary of the development of the first laser, created from a ruby red crystal on this date in 1960.