The correct answer is: A. Infrared radiation.
Infrared radiation has the longest wavelength of all the electromagnetic radiations. It is a type of non-ionizing radiation that is emitted by all objects that have a temperature above absolute zero. Infrared radiation is used in many applications, such as remote sensing, night vision, and cooking.
X-ray radiation has a shorter wavelength than infrared radiation. It is a type of ionizing radiation that can be used to diagnose and treat medical conditions. X-rays are also used in
security screening and industrial inspection.Ultraviolet radiation has a shorter wavelength than X-ray radiation. It is a type of non-ionizing radiation that can cause sunburn and skin cancer. Ultraviolet radiation is also used in germicidal lamps and some types of photography.
Visible
radiation has the shortest wavelength of all the electromagnetic radiations. It is the type of radiation that we can see with our eyes. Visible radiation is used in many applications, such as lighting, photography, and television.