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      Question

      The International Day of Light is observed annually on

      May 16 to commemorate which event?
      A Invention of the light bulb Correct Answer Incorrect Answer
      B Theodore MaimanтАЩs first successful laser operation in 1960 Correct Answer Incorrect Answer
      C Discovery of solar energy Correct Answer Incorrect Answer
      D First LED light creation Correct Answer Incorrect Answer
      E Founding of UNESCO Correct Answer Incorrect Answer

      Solution

      The International Day of Light is observed on May 16 to commemorate Theodore MaimanтАЩs first successful laser operation in 1960. The 2026 theme is тАЬLight for a Sustainable FutureтАЭ. The IDL traces its origins to the International Year of Light and Light-based Technologies (IYL 2015).

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