Found 34 Articles for Optics

Toric lens comes with different focal lengths and optical power in 2 orientations that are perpendicular to each other. One surface of the lens has a shape like a cap from the torus, and the other one has a spherical shape. This toric lens behaves just like the combination of cylindrical and spherical lenses. The lenses that are made of RGP are more delicate than other lenses. The toric lenses that have markings of the six o’clock position are with asymmetrical dynamic stabilization and are vital for thinner and larger peripheral zone to be oriented for optimal interaction of lids. ... Read More

Introduction In the laboratory, several scientific instruments are required to process the experiments. Among such scientific devices, the Simple microscope has been considered one of such instruments that are generally used in order to identify or see small objects that usually occur to be unseen by a naked eye. Based on this concept, the current tutorial will define a Simple microscope along with explain several parts of it as well. Simple microscope: Definition Figure 1: Simple microscope A Simple microscope has been considered the first microscope that is constructed in the 17th century by Antony van Leeuwenhoek. ... Read More

Introduction The resolving capacity of a particular instrument is very important as it allows the detailed analysis of a particular object. Resolution denotes the level of details that is observed by a microscope. It refers to the ability of a particular optical system to create distinguishable images of the objects which are separated by little angular distances. For microscope and telescope, the resolving power can be defined as the capacity of an optical instrument to recognize and distinguishes a certain distance between 2 objects. Resolving Power of Microscopes and Telescopes The resolving power of a microscope and telescope refers to ... Read More

Introduction In this tutorial, we will learn about concave lens. The image produced by the concave lens, the nature of the image formed, and ray diagrams related to the concave lens will be described in detail here. Before proceeding further, let's recall some of the important points related to the concave lens. A concave lens diverges the incident rays. The diverged rays meet at a virtual point called Focus (F1) that exists on the opposite of the lens. The distance from Focus (F1) to Optical Centre (O) is called focal length (f1). A principal axis is a straight imaginary ... Read More

Introduction Have you ever seen a magnifying glass?  That is an example of a spherical lens. But do you know what type of lens it is? Let us go through this tutorial on the concave-convex lenses (spherical lenses) to know about the components and structure of the spherical lenses. Introduction: Spherical Lenses You may have heard and already learned about the plane reflecting surfaces as well as spherical reflecting surfaces. The spherical reflecting surfaces are of two types and can be referred to as concave and convex mirrors, as per their structure. That is to say, if a spherical reflecting ... Read More

Introduction Let's understand various concepts related to the spherical mirrors, that is to say, concave and convex mirrors. Before starting the tutorial, you must recall some important points about the light and reflection on a plane surface. This will help you to understand the light reflection on the spherical surfaces. So, let's understand the two main points about the reflection of light on a plane reflecting surface before starting the tutorial on spherical mirrors. Reflection of Light on Plane Mirrors The laws of reflection state that – The angle of incidence ($\angle$i) and the angle of reflection ($\angle$r) ... Read More

Introduction You may have observed that whenever you stand in front of the mirror, you get an erect, virtual, and same-sized image of yourself. Here, erect means not inverted and virtual image means behind the mirror. Similarly, the images formed by the concave and convex mirrors have different natures. Some images look erect and some are inverted. Also, it can be a real or a virtual image. While compared according to size, the images formed may be of the same size or enlarged, or small-sized. In this tutorial, all these natures of images formed by concave and convex mirrors ... Read More

Introduction The thin lenses have the yields of a negative distance of image, and the virtual images are on the same side as the object faced on the lens. The positive and negative sides of the images are useful to calculate the distance of the image in the real life as a lens equation. The convention of the positive direction is always quantifiable with the direction where the light is travelling through the lens. The direction of the object is negative as the lens image travels a distance from the object and the direction is on the opposite side of ... Read More

Introduction Light travels a straight path when it bends while travelling in a single direction. A certain change in the speed of light causes a directional change in its path and that is when refraction happens after light passes a boundary from one transparent medium to another. The bending of light by refraction makes it possible for the human retina to observe prisms and rainbows. Without refraction of light, the human eye cannot focus on the pathway of light. What is Refraction of Light Refraction refers to the process of bending light immediately after it passes from one transparent substance ... Read More

Introduction The direction of light immediately changes after it passes from one medium to another. In simple words, light bends while travelling from one medium to another. In the case of a glass prism, the degree of refraction varies with the light's wavelength. It eventually gets segregated into seven different lights while passing through a glass prism in real-time. When the wave of the light travels from one optical medium to another, refraction takes happens. It is mostly caused by the difference in optical density between different mediums. What is the Refraction of Light in a glass prism? In a ... Read More