Which famous scientific brand revolutionized microscopy in 1932 by introducing the first commercially successful phase-contrast microscope, allowing scientists to view living cells without staining them?

The evolution of scientific instruments has been closely tied to commercial innovation and brand positioning. One particular instrument transformed biology and medicine, becoming a symbol of scientific inquiry. Test your knowledge about a pivotal moment in microscope technology history that changed both science and a famous brand's trajectory in the scientific equipment market.

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Zeiss
Nikon
Leica
Olympus