A hand lens is used to magnify items. Hand lenses are used in scientific research, police work and everyday life. Hand lenses are magnifying glasses small enough to be held in a hand and easy to manipulate.Know More
Hand lenses are useful in both private and professional life. In private life, they are used for hobbies or to aid deteriorating eyesight. Manipulating small parts on model cars is an example of hobby use, while using a hand lens to read a book or other text helps when the user is losing his eyesight. In professional use, hand lenses help many different types of workers. Scientists use hand lenses to view little things, such as pebbles, bugs or small particles, that do not need to be put under a microscope. Police use hand lenses to search for small pieces of evidence and more closely examine them, such as hair, lint and fingerprints. Jewelers use hand lenses to pick out specific details and faults within gemstones to appraise the value of the jewel.
Hand lenses have been in use for centuries and come in many different shapes and sizes. The most common shape is a circle with a handle, but there are also rectangular and square hand lenses that are regularly used.Learn more about Optics & Waves
While a regular lens is shaped like a slice from a ball, a toric lens is shaped like a slice from the side of a donut, with a hole or depression in the middle area. Toric lenses are used in contacts and glasses to correct astigmatism.Full Answer >
As a beam of light passes through a lens, one of three things may occur, depending on the shape of the lens. The light either passes straight through the lens, is bent away from the center of the lens, or is bent towards the center of the lens.Full Answer >
According to Glo Bright, a black light is generally used to illuminate bedroom posters or glowing paint used in places like bowling alleys, haunted houses, amusement parks and miniature golf courses. A black light can be used for illuminating crime scenes in search of biological substances like urine and blood.Full Answer >
Concave mirrors are used in car headlights, flashlights, telescopes, microscopes, satellite dishes and camera flashes. Dentists and ear, nose and throat doctors use concave mirrors during examinations to see a larger image of what they are examining. Concave mirrors are also used in solar-powered gadgets and visual bomb detectors.Full Answer >