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.Continue Reading
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
A lens refracts light by slowing it down and bending it with regard to the "normal" line, a line at a right angle to the surface of the lens. When the light passes through the far side of the lens and speeds up, it bends away from "normal," refracting further.Full Answer >
Prolonged exposure to high levels of infrared radiation could lead to burns and cause eye problems, including cornea and retina damage, cataracts and injuries to the eye lens. In addition, infrared radiation can cause pain to the skin of a person in close contact with it.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 >
A condenser lens is the part of a compound microscope responsible for focusing light on the slide. This lens is included on almost all microscopes manufactured since the 19th century and is usually found on the bottom of a microscope below the stage and above the electronic light source.Full Answer >