
Cell biology and microscopy (article) | Khan Academy
An electron microscope focuses beams of electrons on specimens instead of visible light. Electron microscopes can visualize details at a much smaller scale compared to light microscopes.
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Microscopy: Intro to microscopes & how they work (article
The production and distribution of microscopes, especially electron microscopes, can vary from year to year and depend on several factors. While I don't possess the exact figures for the …
Microscopia (artigo) | Introdução às células | Khan Academy
Num microscópio composto de duas lentes, a organização das lentes tem uma consequência interessante: a orientação da imagem que você vê é invertida em relação ao objeto que está …
Microscopie (leçon) | Khan Academy
Les microscopes électroniques diffèrent des microscopes optiques car ils produisent l'image d'un spécimen en utilisant un faisceau d'électrons et non pas un faisceau de lumière.
Scale of cells (video) | Cell size | Khan Academy
This is using an electron, this is using an electron microscope you see a red blood cell right over here and you see a T-cell and they're roughly roughly on the same size, or at least the same …
The Bohr model (article) | Atomic structure | Khan Academy
Until we measure an electron's position, we don't know exactly where it is. The best we can do is describe where we're likely to find electrons around a nucleus.
Structure of anther and microsporangium - Khan Academy
The above image is a high resolution picture of two anthers, taken using a scanning electron microscope. You can see pollen grains on the surface (the round objects).
The history of atomic chemistry (video) | Khan Academy
Because it's based on probability, quantum style atoms are often drawn as clouds with the intensity of color representing not individual electrons but the probability of finding an electron …
Mikroskopi (Makale) | Hücreler | Khan Academy
Geçirimli elektron mikroskopisinde (TEM), numune, incelenmeden önce elmas kesme tekniği kullanılarak son derece ince kesitlere ayrılır, elektron demeti, numunenin yüzeyini taramak …