Magnification is expressed in numeric multiples of how much enlargement occurs with a lens. If the magnification of a lens is 2X then it roughly doubles the size of the image of the object. With a compound microscope, the total magnification can be determined by multiplying the magnifications ...
It takes a much more powerful electron microscope—using beams of electrons instead of rays of light—to take us down to nano-dimensions. Let's take a closer look at electron microscopes and how they work!Photo: This Hitachi S-4700 field-emission, scanning electron microscope can magnify over...
Compound light microscopes are valuable tools in the lab. They magnify our ability to see in detail by up to 1,000 times, allowing us to study things as small as the nucleus of a cell. With them, we can determine the shape and structure of cells, observe the movements of microorganisms,...
Lighting is a key component in macro photography. As we shoot subjects our naked eye struggles to see, we need as much light and detail as possible. You can use both natural and artificial light with macro photography, and each has its advantages. As we will shoot close-ups of our subjec...
Since we depend so much on the lenses inside those frames to improve our view of the world, you might wonder just what goes into creating them. In this article, we will talk about how the eye focuses, how a lens works, how to read a prescription, and finally, how the lens is...
Instead, the objective lens of a microscope is small and spherical, which means that it has a much shorter focal length on either side. It brings the image of the object into focus at a short distance within the microscope's tube. The image is then magnified by a second lens, called ...
Compound microscopes, also known as optical or light microscopes, work by making an image appear much larger through two systems of lenses. The first is the ocular, or eyepiece lens, that you look into when using the microscope that typically magnifies at a range between five ...
If you want to see a hologram, you don't have to look much farther than your wallet. There are holograms on most driver's licenses, ID cards and credit cards. If you're not old enough to drive or use credit, you can still find holograms around your home. They're part of...
A history of the microscope starting with use of a simple lens to the first compound microscope in 1590 and including the microscopes of the 19th century.
These have much better resolution than optical microscopes, because the wavelength of electrons is about 100,000 times shorter than visible light. However, this type of microscope can't reveal living cells, because the preparation steps or high-energy electron beams kill them. Here, a hydrothermal...