Search results
Results from the WOW.Com Content Network
If you just bought the new iPhone 14, these accessories will come in handy. Shop blue light-blocking screen protectors, wireless chargers, power banks and more.
A flashlight may have a red LED intended to preserve dark adaptation of vision. Ultraviolet LEDs may be used for inspection lights, for example, detecting fluorescent dyes added to air conditioning systems to detect leakage, examining paper currency, or checking UV-fluorescing marks on laundry or event ticket holders. Infrared LEDs can be used ...
Leakage may also mean an unwanted transfer of energy from one circuit to another. For example, magnetic lines of flux will not be entirely confined within the core of a power transformer; another circuit may couple to the transformer and receive some leaked energy at the frequency of the electric mains, which will cause audible hum in an audio application.
Either when it has been completely consumed or after three to five years from its manufacture (its shelf life), [2] a zinc–carbon battery is prone to leaking. The byproducts of the leakage may include manganese hydroxide, zinc ammonium chloride, ammonia, zinc chloride, zinc oxide, water and starch. This combination of materials is corrosive ...
Battery holders with pressure contacts. In the late 1800s, patents were issued for consumer products like flashlights; US patent no. 617592 dated March 1898 is for an early metal flashlight that accepted D batteries. Some early 1900s battery holders were often no more than a cardboard box with copper contacts.
A light leak is a hole or gap in the body of a camera, or other optical instrument, where light is able to "leak" into the normally light-tight chamber, exposing the film or sensor with extra light. This light is diffused, although parts within the camera may cast shadows or reflect it in a particular way. For most purposes this is considered a ...
A leak appearing within an analytic region (a rule added to the camera) is immediately analyzed for its attributes, including thermal temperature, size, and behaviour (e.g. spraying, pooling, spilling). When a leak is determined to be valid based on set parameters, an alarm notification with leak video is generated and sent to a monitoring station.
Such a bulb could only be used once, and was too hot to handle immediately after use, but the confinement of what would otherwise have amounted to a small explosion was an important advance. A later innovation was the coating of flashbulbs with a plastic film to maintain bulb integrity in the event of the glass shattering during the flash.