IN a recent paper 1 I derived formulæ expressing the distribution of light in the geometrical focal plane of optical systems of high relative aperture; and, using these formulæ, curves were given ...

Researchers at the University of California are working on a technology that is able to enhance the resolution of a standard light microscope, allowing it to directly view finer structures and details ...

IN a recent paper Ruska 1 demonstrated experimentally the possibility of surpassing considerably the resolving power of an ordinary microscope by the use of an electron microscope. This high resolving ...