Jan 16, 2026 · A microscope is an instrument that makes an enlarged image of a small object, thus revealing details too small to be seen by the unaided eye. The most familiar kind of microscope is the …

In the optical microscope the image is formed by absorption of light in the specimen; in the electron microscope the image results from a scattering of electrons by atoms in the specimen.

If X-rays let chemists peer at the structure of atoms, scanning tunneling microscopes finally revealed the atoms themselves. Rather than bounce light off something, an STM runs a sharp needle over the …

Jan 16, 2026 · The traditional simple microscope was made with a single magnifying lens, which was often of sufficient optical quality to allow the study of microscopical organisms including Hydra and …

Jan 20, 2026 · This model is based on the idea that vesicles bud off and fuse to cisternae membranes, thus moving molecules from one cisterna to the next; budding vesicles can also be used to transport …

Feb 9, 2026 · scanning electron microscope (SEM), type of electron microscope, designed for directly studying the surfaces of solid objects, that utilizes a beam of focused electrons of relatively low …

This microscope was developed in 1903 to study colloidal particles. These tiny particles—larger than atoms but too small to be seen with an ordinary optical microscope—are suspended in a liquid and …

Jan 29, 2026 · The reality of atoms was established by the explanatory power of the model on the one hand and by ever more direct images of microscopic entities on the other. As the atomic model of …

Dec 18, 2025 · He considered the process of measuring the position of an electron by observing it in a microscope. Diffraction effects due to the wave nature of light result in a blurring of the image; the …

Jan 20, 2026 · This model is based on the idea that vesicles bud off and fuse to cisternae membranes, thus moving molecules from one cisterna to the next; budding vesicles can also be used to transport …