The term stereoscopic vision refers to the human ability to view with both eyes in similar, but slightly different ways. This allows humans to judge distance, which develops their ability to have true depth perception. Historically, the human’s ability to view the world through stereoscopic sight has given him/her a significant advantage over entities and animals in the wild that do not possess this capability. How does Stereoscopic Vision Work? For people and animals that have stereoscopic vision, each eye sees a similar, but slightly different image. This difference is Read More

A projector is able to accomplish a projection with the help of a combination of lenses along with the other technical things. A Fresnel lens projector is one which has different Fresnel lenses placed in the projector. Fresnel Lens Fresnel lens was invented by a French physicist, Augustin-Jean Fresnel. These lenses have a large aperture and a short focal length. They are very thin and are lighter in weight allowing more light to pass through. Thus, are used in the objects where bulky lenses are prohibited. An Overhead projector (OHP) Read More

A laser sight is a device that shoots a laser at a certain target. It is often used within many military applications, especially with guns. Basically, the laser sight is a visible laser light that allows the shooter to see where the bullet will hit. It is located (or structured to fit) above the body of the small arm at a precise angle facing down, so that the laser will point directly at the spot where the bullet will most likely hit. However, as with all devices, the laser is Read More

Refractometers measure the refractive index of liquids, gases, and translucent solids such as gemstones. The measurement of how much the speed of light is reduced when traveling through a gas, solid, or solution is referred to as the refractive index. When the device is used to test liquids, it typically measures the salinity, fluid concentration, specific gravity, and blood proteins. The lenses and prisms inside the refractometer create a shadow line inside it that can then be viewed through a magnifying eye piece to note the measurement. Who Invented the Read More

The Tyndall Effect refers to the reflection of light as it comes in contact with small particles in a translucent medium. It involves the scattering of light in different colors depending on how short or long a particular wavelength is. For example, the Tyndall Effect can describe the haze seen as light travels through a window covered in dust or the light from a flashlight comes in contact with fog in the air. In these situations, dust and water droplets cause the light to be reflected in a scattered pattern Read More

A Laser cutter is a machine that uses a laser to cut materials. The Laser Cutter works by making the laser enter through the side of the material that needs to be cut and shoots it through the axis of the beam. If a cut needs to be made and there are no edges near it, a small piercing is done before the cut. During a piercing, a high power concentrated pulse of laser beam slowly starts to make a hole, creating an edge to begin the laser cutting with. Read More

Rayleigh scattering refers to a phenomenon in which light is scattered by particles in the atmosphere that are much smaller than its wavelength. It can also apply to other forms of electromagnetic radiation as well as other media, but can be seen most directly in the sky. Rayleigh scattering is responsible for the sky’s many different colors, such as blue during the day, orange at sunset, and even the yellow hue of the Sun. Different wavelengths of light that are reflected off of small molecules, dust, and other particles in Read More

The light bulb, invented in 1854, has been a crucial component of civilization since. Contrary to popular belief, the light bulb was invented by Henricg Globel, a German watchmaker, not Thomas Edison. Edison did improve on the idea of the incandescent light bulb, though, and strived to make it better. Due to the works of Globel, Edison, and others, long-lasting light bulbs are now in every room of every house and building. This article will explain the art that went into creating the light bulb by showing various parts of Read More

It used to be believed that light was simple energy and that there were no particles in it. However, with the study of the quantum, scientists were able to deduce that light was actually make up of small particles known as photons.Quantum optics is the study of light and its interactions with matter. More specifically, quantum optics is a field of study where scientists observe the nature and effects of light on photons that are being quantified. Understanding Quantum Optics Quantum optics is confusing to individuals for the simple fact Read More

A radar laser detector (although separately known as a radar detector and a laser detector) is commonly used by motorists to see if their speed is being spied on by some radar unit. Simply put, the police would "shoot" a radio wave to the moving vehicle with a radar gun, and the speed would be calculated using the principles of the Doppler Effect. In addition, recent speed detectors have evolved into using the laser technology. Also known as LIDAR (Light Detection and Ranging), it uses pulsed laser instead of the Read More