Which revolutionary scientific instrument was initially developed as a byproduct of failed attempts to create a more powerful microwave?

Throughout the history of science, certain products have revolutionized research capabilities and transformed how scientists work. Behind every groundbreaking scientific tool lies a fascinating product development story. This poll explores how one of the most influential scientific instruments came to be through an unexpected development process. Test your knowledge about the intersection of product development and scientific innovation!

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Scanning Electron Microscope (SEM)
Microwave Accelerated Reaction System (MARS)
Magnetic Resonance Imaging (MRI) scanner
Gas Chromatography Mass Spectrometer (GC-MS)