Lens

A light microscope works like a telescope using glass lenses to reflect light, which magnifies images which are naked to the human eye such as cells and dust. The lens closest to your eye is called the eyepiece lens. This usually has a magnification of x10. Objective lenses are lenses of several different strengths which magnify the image. The stage is the place where the microscopic slide sits. This is held in place by the clips. The light source (can be a mirror or a bulb) projects light onto the microscope slide - the diaphragm controls how much light enters the microscope. The base is heavy to keep the microscope from falling over. The arm of the microscope holds the eyepiece lens above the stage. Both focus knobs are used to make sure…

1. What is macro photography?: Macro photography is when you take a photograph of a very small object very close up. 2. What are the advantages and disadvantages of macro lenses?: Macro lenses can magnify a small object to be life size without any other attachments but they are very expensive 3. What are extension tubes? What are the advantages and disadvantages of this piece of equipment?: Extension tubes are hallow tubes placed between the camera and the lens. They aren't as good as macro…

Introduction A lens is an object that forms images by refracting light. The images formed can be magnified, real and virtual depending on what lens used and the set-up of the lens system. There are two types of lenses, converging and diverging lenses. Converging lenses cause parallel light rays to converge to a point. Diverging lenses cause parallel light rays to diverge. Typically converging lens are thicker in the middle and diverging lenses are thinner in the middle. Lenses are used for many…

The goal of the first part of the experiment was to examine the focal lengths of various thick lenses, spherical aberration, and 1D magnification. First, we observe that the focal length does not seem to change when we move the lens closer and farther away from the box. Then, we find that the light rays converge after passing through the bi-convex and plano-convex lens and diverge after passing through the bi-concave lens. Therefore, the focal length of the bi-concave lens is negative. We also…

When a lens produces an image, the size of it corresponds to the focal length of the lens. The smaller the focal length, the smaller the image and the longer the focal length the bigger the image. How bright an image may be solely depends on the amount of light collected by the objective lens. How much light can be collected corresponds to the area of the objective lens. So the bigger the objective lens, the more light can be collected. If you want to increase the light gathering power by 4, you…

scientists have created a type of bionic lens that allow humans to zero in on the tiniest of objects without the assistance of a third item such as the microscope. For hundreds of years, scientists have been using the microscopes to make major discoveries such as proving the existence of minuscule living organisms that cannot be seen to the naked eye. However due to the physical laws restricting light to pass through conventional lens to see these small items, we had begun to be dependent on…

Spherical Traditional lens are the typical, rounded design of contact lenses, which can correct near-sightedness (myopia) or farsightedness (hyperopia). Google contact lens are smooth spherical cell, they constructed a new LCD-based contact lens display, which also corrects myopia and hyperopia. In term of spherical, both of these lenses provide somewhat same type of treatment and corrections. Improves health As technology moves further into health treatment, and advanced digital diagnosis…

As discussed in the previous paragraphs, the smart contact lens will have many good effects on the community. For one, this new technology will help with health problems and deaths at a younger age. Not only is this new piece of technology going to help with serious health problems it will help with eyesight. Just think about it, helping with those two main things could more than likely help with car wrecks or any other accidents that happen. Being able to focus on what you are actually looking…

The part of the image that is seen through the lens is in focus while everything outside of the lens frame is out of focus. The human eye is a fascinating organ. There are many parts of the eye that aid in allowing a person to see, but this paper will talk only the components that allow images to form on the retina. In general, the ciliary muscle can relax or contract to adjust the focal length of the lens. When the muscle is contracted, the curvature of the lens increases, thereby decreasing…

examine what you see through the microscope, your final results should be a drawing of what you saw through both the high and low powered lens. Introduction- This lab is based on the compound light microscope. “A compound light microscope is a microscope that allows light to pass through a specimen and uses two lenses to form a image”. The compound light microscope has two main lenses. The two main lenses are the low powered lens and the high powered lens. The low powered lens is 10x,…