Thin lens

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 applications they are used in glasses to correct eyesight, cameras to focus and capture light to form images, telescopes and also magnifying glasses. The theory of lenses can be very complicated especially for multi lens system. However in the special…

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 observe that the focal length of the plano-convex lens is greater than that of the bi-convex lens, which is due to the fact that one side of the plano-convex lens is flat while the other side is…

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…

eye, it’s a thin dome-shaped oval from the front and circular from behind and covers the front part of the eye which include iris, pupil and anterior chamber. It forms anterior 1\6 of the outer coat of the globe.[1] The sclera and the conjunctiva overlap the cornea more vertically than horizontally. Together with the lens, the cornea refract light, and it is approximately 43 diopters of the total refractive power[2]. The curvature of the lens, on the other hand, can be adjusted to tune the focus…

During the microscope lab, my partner and I learned how to properly use a microscope, calculate the field of view, and view and prepare slides. Microscopes are instruments used to view very small objects that cannot be seen with the naked eye. We found that microscopes have many different parts to them, including the diaphragm, ocular lens, and objective lenses. There are three powers of magnification, scanning power (4x), low power (10x), and high power (40x). To find the total magnification,…

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…

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…

inverted image of the letter “e” When the slide was moved to the left, by looking through the ocular lens, the letter seemed to move to the right and vice versa. When the slide was moved to the front, the image of the letter “e” moved to the back and vice versa. The “working distance” is the distance between the objectives and the stage. When the objective was moved to the next higher power (in this experiment the low power objective) and the slide was put into focus, the working distance…

For instance, you can set the Exposure Value (EV) increments correspondingly to capture very dark images, correctly expose images and overexposed image. Manual adjustments can also work, if the camera you are using doesn’t feature a multiple exposure setting between the shots. According to Picture Correct, the ideal setting is (-2) EV for the first photo; (0) EV for the second photo and (+2) for the third photo. To control the shutter speed and ensure consistency between the shootings, set your…

something but banking on how many times he hasn’t it’s not much. On those days he vanishes into night nothing is left behind but negative energy. My brothers stewing in rage, resenting his menial contribution, my mom lays distraught contemplating all her choices, blaming herself; and for some reason no one restrains their feelings from me. His whims often leave us high and dry‒ all risk, little reward creating an unstable home environment. Left to their own vices in risky housing, children often…