Optics is the branch of physics that deals with interaction of light with matter. The field of optics helps us understand wide variety of phenomena such as reflection, refraction, diffraction and interference of light. Many optical instruments such as lenses, mirrors, microscope and telescopes helps us observes different phenomena in the world. Moreover the field of optics has numerous applications in photography, astronomy, medicine and fiber-optic communication.
When you look at pictures of telescopes, you may notice that some have long tubes with lenses, while others have shorter tubes with mirrors. These two designs represent the two main types of telescopes: refracting telescopes and reflecting telescopes. Both are designed to collect light from distant objects and make them appear larger and brighter, … Read more
You might have wondered why leaves are green, apples are red, crows are black. In short, why different objects have different colors? The colors we see are the result of light, objects, and our eyes working together. When white light (such as sunlight) hits the surface of an object, then depending upon the nature of … Read more
Have you ever watched a movie where objects seem to jump out of the screen or feel as if they are far away in the background? This exciting visual effect is made possible by 3D glasses. These special glasses help our brains see images in three dimensions, making movies more immersive and realistic—just like real … Read more
Have you ever wondered how a mirror shows your exact face every morning? Mirrors seem magical, but they actually work through fascinating science involving materials and light behavior. Let’s explore how mirrors form images, what they are made of, and the optical principles that make reflections possible. The Science of Reflection When light hits any … Read more
What is a mirage? A mirage is a naturally occurring optical illusion that occurs when light bends due to temperature differences in the air and result in making objects appear to be in different location than they are. Sometimes, it also creates a view of a pool of water or a distorted reflection on the … Read more
Do you know what do cameras, eye glasses, telescopes and microscopes have in common? The object at the core of these devices is an optical lens. A lens is a transparent object and light is refracted when it passes through the lens. Lens is used in many optical instruments such as cameras, microscope, telescope, optical … Read more
Binoculars are interesting devices that helps us in viewing distant objects with some level of magnification. It can be used for many things such as sporting events, star gazing, bird watching along with many different natural views. How it works? The below diagram shows the construction of a typical binocular: In order to understand the … Read more
A sundial is an ancient timekeeping device which uses the position of the sun to indicate the time of day. It has been in use well before the advent of mechanical clocks. Sundial typically has two components namely a flat plate usually known as the dial and a stick or triangular piece called as gnomon. … Read more
Air is certainly the most important thing in our life. In fact that’s what keeps us alive. With air, we maintain certain pressure in the tires of our vehicles to keep ourselves moving. We fill our birthday balloons with air. We fly airplanes in air using aerodynamic principles. It helps us burning various fuels for … Read more
While travelling on highways during night, one thing you might have noticed that the signboards along the highways are almost always visible. Moreover they appear to glow as your vehicle approaches the signboards. Have you wondered what might have caused these signboards to glow during night? Surely there is some kind of reflection of light … Read more