W-2: This is your most important form. Youâll need one from each employer you worked for over the past year. A W-2 shows the amount of money you earned, the amount withheld for income taxes and Social Security and Medicare taxes, and any contributions you made to a retirement plan, medical accounts, or child care reimbursement plan.
IR wireless (infrared wireless) IR wireless is the use of wireless technology in devices or systems that convey data through infrared (IR) radiation. Infrared is electromagnetic energy at a wavelength or wavelengths somewhat longer than those of red light. The shortest-wavelength IR borders visiblered in the electromagnetic radiation spectrum;the longest-wavelength IR borders radio waves.
Infrared (IR) radiation is a type of electromagnetic radiation (a wave with electricity) . The wave is longer than light which humans can see and shorter than microwaves. The word infrared means below red. It comes from the Latin word infra (meaning below) and the English word red. (Infrared light has a frequency below the frequency of red light.) Red light has the longest wavelength that human eyes can see. Infrared waves cannot be seen by the eye. The infrared wave is between 800 nm and 1 mm. People sense infrared as heat.