The correct answer is Infrared Rays. To send a signal to a television, remote controls often use a diode that emits light at around 940 nanometers in wavelength, which falls into the range of near-infrared light.Important PointsUltraviolet Rays:UV radiation is widely used in industrial processes and in medical and dental practices for a variety of purposes, such as killing bacteria, creating fluorescent effects, curing inks and resins, and phototherapy.X-Rays:X-rays can be used to examine most areas of the body.X-rays are used to look at the bones and joints, although they're sometimes used to detect problems affecting soft tissue, such as internal organs.