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
Light sensors may be used in burglar alarms or inside garage door openers. Light shines between sensors, and if the something interrupts the light, the device knows an object’s there. In addition, they are also used in street lights to determine when it's dark enough for the light to switch on.Full Answer >
Concave lenses are used for correcting myopia or short-sightedness. Convex lenses are used for focusing light rays to make items appear larger and clearer, such as with magnifying glasses.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 >
Mirror reflections are used in the construction and working of solar cookers, solar heaters, periscopes, binoculars, looking mirrors, microscopes, cameras and in a kaleidoscope. Apart from plane mirrors, reflection of light from convex and concave mirrors is used in everyday applications too.Full Answer >