Which scientific instrument launch was accompanied by a marketing campaign declaring it would 'make the invisible visible' and featured simultaneous demonstrations across major research institutions in 1931?

Test your knowledge about groundbreaking scientific product launches that changed our understanding of the world or revolutionized research capabilities. Throughout history, certain scientific instruments, technologies, and tools have dramatically accelerated discovery and innovation across multiple fields. This poll challenges you to identify when a particularly significant scientific product first became available to researchers and the public.

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• The first commercial electron microscope by Ernst Ruska and Siemens
• The first mass-produced pH meter by Arnold Beckman
• The first commercial spectrophotometer by Bausch & Lomb
• The first Geiger-Müller radiation counter for laboratory use

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