Give the following four kinds of electromagnetic waves in people's lives, the production of examples of applications

(1) Radio waves: radar, radio stations, television transmissions, mobile communications, telegraph.

(2) microwave: microwave communications, microwave ovens

(3) ultraviolet: ultraviolet sterilization, fluorescent lamps, banknote detectors

(4) X-rays: medical equipment (fluoroscopy, filming), metal detectors, security equipment