Introduction to microscopes and how they work. Covers brightfield microscopy, fluorescence microscopy, and electron microscopy.
Log in inuyashamonkey 9 years agoPosted 9 years ago. Direct link to inuyashamonkey's post “i was reading a question ...” i was reading a question about where human samples come from, and i was wondering why the cells die when they get into the vacuum. • (34 votes) Alex 9 years agoPosted 9 years ago. Direct link to Alex's post “Cells die upon entering a...” Cells die upon entering a vacuum because a vacuum is a void. This means that there is nothing there. There is no air, just the absence of matter. In the absence of matter, a cell cannot survive. Plus, a cell in a multicellular organism cannot survive on its own for long, anyway. (33 votes) Pran Ram 7 years agoPosted 7 years ago. Direct link to Pran Ram's post “When Was The Electron Mic...” When Was The Electron Microscope invented ? • (13 votes) Tehnan 7 years agoPosted 7 years ago. Direct link to Tehnan's post “The electron microscope w...” The electron microscope was invented in 1931 by German physicist Ernst Ruska, and an electrical engineer, Max Knoll. (22 votes) Spoonie 8 years agoPosted 8 years ago. Direct link to Spoonie's post “Why is an objective lens ...” Why is an objective lens called that? • (9 votes) Daberculosis 8 years agoPosted 8 years ago. Direct link to Daberculosis's post “The lens closest to the o...” The lens closest to the object it is observing is called the objective lens. Get it? Object / Objective. It focuses light directly from the object to observe it. (18 votes) baileyw24 a year agoPosted a year ago. Direct link to baileyw24's post “How many microscopes are ...” How many microscopes are made per year, both types of the electron microscopy. Who produces and, or make them with what foundation. • (9 votes) DMS_HK 10 months agoPosted 10 months ago. Direct link to DMS_HK's post “The production and distri...” 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 current year, I can provide you with some general information. Electron microscopes are typically produced by various manufacturers around the world. Some prominent companies known for manufacturing electron microscopes include JEOL, Thermo Fisher Scientific, Carl Zeiss AG, Hitachi High-Technologies Corporation, and FEI Company, among others. These manufacturers often collaborate with various foundations, research institutions, and academic organizations to develop and manufacture electron microscopes. Additionally, there are government-funded initiatives and independent research institutes that contribute to the advancements in microscope technology and their wide availability. It's important to note that the production numbers may vary significantly each year due to market demands, technological advancements, and research funding. To get specific figures for a particular year or detailed information about the production and distribution process, it would be best to consult industry reports, companies' annual reports, or contact the respective manufacturers directly. (14 votes) Daniel Kayode 8 years agoPosted 8 years ago. Direct link to Daniel Kayode's post “what is a light microscop...” what is a light microscope • (7 votes) Matt B 8 years agoPosted 8 years ago. Direct link to Matt B's post “A light microscope is the...” A light microscope is the typical microscope you would use at home: you simply observe something as it is using regular ilght. (14 votes) connergirl05 a year agoPosted a year ago. Direct link to connergirl05's post “does time exist in perfec...” does time exist in perfect void? • (5 votes) AuroraAlberts a year agoPosted a year ago. Direct link to AuroraAlberts's post “The void contains no spac...” The void contains no space, no time, no mass, and no charge. I see it kinda like this: On Earth, one minute is 60 seconds. But on Mars, it is different. Same as all the other planets, because we tell the time via how we revolve around the sun, and how fast our planet is spinning. So if there were no sun and you weren't on a planet, there would be no time. Time is a relative concept with no absolute, and is used as a guide to measure events in various ways. With gravity and possibly voids, all they do is slow the event down, not time. So if you were an astronaut in space, you would only know how "old" you are if someone Earth were to tell you what the time is! (11 votes) Leo D 9 years agoPosted 9 years ago. Direct link to Leo D's post “how much can the most pow...” how much can the most powerful electron microscope magnify? • (3 votes) Serena 9 years agoPosted 9 years ago. Direct link to Serena's post “A light microscope can on...” A light microscope can only magnify up to 1000-2000 times, an electron microscope can magnify something up to 2 million times. (10 votes) drew.browning 9 years agoPosted 9 years ago. Direct link to drew.browning's post “Why is wave length the li...” Why is wave length the limiting factor? • (3 votes) Katrina Zub 9 years agoPosted 9 years ago. Direct link to Katrina Zub's post “Correct me if I'm wrong, ...” Correct me if I'm wrong, but according to the formula for resolution, the smaller the wavelength the better the resolution. That being said the shortest wavelength for visible light is blue at 450nm. Anything shorter our eye cannot capture. (14 votes) Sondra C. 7 years agoPosted 7 years ago. Direct link to Sondra C.'s post “can they still use the de...” can they still use the dead cells and can they get living cells from dead people? • (2 votes) Shannon 7 years agoPosted 7 years ago. Direct link to Shannon's post “And for the second questi...” And for the second question, it would depend on how you classify a "dead" person. Some countries pronounce a person dead if their heart stops, whereas others have it as when there is no activity in the frontal lobe (of the brain). Any sample from a dead person would have to be taken very shortly after their "death", as the cells start to die (or are already dead) within minutes. You may, depending on the circ*mstance and whether they are "dead" when their heart ceases functioning, be restricted to what sample of living cells you can retrieve. If you somehow access the heart very soon after "death", you may stand a chance at getting a sample, although I do not recommend trying to do any of this as it is a: rather suspicious, and b: you may be required to commence cardiopulmonary resuscitation (CPR). This is all quite hypothetical, and don't try any of this, please. (11 votes) Sameer Kumble 8 years agoPosted 8 years ago. Direct link to Sameer Kumble's post “which is the world's smal...” which is the world's smallest cell? • (4 votes) Ivana - Science trainee 5 years agoPosted 5 years ago. Direct link to Ivana - Science trainee's post “World smallest cell: SAR1...” World smallest cell: SAR11 micro-organism (found in sea water). Length 1 micrometer. Human smallest cell: sperm cell. (5 votes)Want to join the conversation?
Other more specific and advanced microscopes might use electro-magnetic radiation that is not in the visible spectrum, such as electron microscope, but these images are not something you can detect by eye without proper machinery assistance.
while Mycoplasma gallisepticum has 10micrometers in diameter.
While granular cells of cerebellum is 10micrometers (soma), sperm cell head is 5micrometers.
