Frits Zernicke (1888-1966) earlier microscopes allowed many specimens to be examined only after they had been transformed by heavy staining and other treatment.
The phase-contrast microscope allowed living cells to be directly observed by depending on the difference in refractive indices between specimens and medium. He won the Nobel Prize for Physics in 1953.
Why is Frits Zernike famous?
Frits Zernike was a Dutch physicist who developed the phase-contrast microscope in 1935.