Sir David Brewster invented this optical device & patented it in 1817
Since you have landed on this page then most probably you are looking for the Sir David Brewster invented this optical device & patented it in 1817 answer. This question was last seen on July 25 2022 Jeopardy TV Game Show.
Answer
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For more questions from this episode visit Jeopardy July 25 2022 Answers