A company called Reflect Orbital wants to illuminate the Earth after sunset with orbital sky mirrors, raising alarm bells.

Reflection-contrast microscopy is a type of light microscopy that can be used to analyze single cells, biopsies, and other small objects. In contrary to most light microscopy techniques, ...

Brightfield microscopy has been widely used for hundreds of years, while reflection contrast microscopy is relatively new technology. As one of the earliest and simplest microscopy techniques, ...

THE author pointed out that most previous experimenters, A especially Rood, had measured the amount of the transmitted light, and that any percentage of error in this ...