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
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 >
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 >
Radio waves are used to transmit signals through the air, with the main benefit being that the only equipment necessary is a transmitter and receiver. There are no cables to string or holes to dig as the waves are simply transmitted from one place to another.Full Answer >
Gamma rays are used in medical applications to treat cancer and to sterilize equipment. Gamma rays are also used as medical tracers to locate tumors.Full Answer >