15th century on- Studies done with glass magnifiers to study objects in detail mostly as a curiosity by non- scientists- Antonie van Leeuwenhoek(linen draper) described three shapes of bacterial cells using his simple single lens microscope(glass bead in metal holder)
15th century on - Studies done with glass magnifiers to study objects in detail mostly as a curiosity by nonscientists - Antonie van Leeuwenhoek (linen draper) described three shapes of bacterial cells using his simple, single lens microscope (glass bead in metal holder)
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By mid-19th century became evident that theoretical lmts of lght were reached Above magnification of 1500, resolution lost. Image was larger, but blurred(empty magnification) In 1870, Ernst Abbe derived mathematical expression for resolution of microscope Resolution is limited to approx. 1/2 the wavelength of illuminating source
By mid-19th century, became evident that theoretical limits of light were reached. Above magnification of 1500, resolution lost. Image was larger, but blurred (empty magnification). In 1870, Ernst Abbe derived mathematical expression for resolution of microscope: Resolution is limited to approx. 1/2 the wavelength of illuminating source
Wavelength-distances! between peaks of the waveform THE ELECTROMAGNETIC SPECTRUM 10110210310410510610710810910 Size of a niger Water Molecule Bates writs name of wave HARD X RAYS MICROWAVES soEX我AY5 CAMMA RAYS ⊥上 ,心 People ght Bb (waves per second) 10610310810910101011101210131014101510161017101810191020 Energy of one electron volts)1091081071061051041031021011103102103104105106
Wavelength - distance between peaks of the waveform