Final answer:
EMR refers to a range of electromagnetic waves, such as visible light, used in various technologies, including microwave ovens and MRI machines. The Sun and Wi-Fi routers are examples of objects emitting EMR.
Step-by-step explanation:
Electromagnetic Radiation (EMR) encompasses various types of waves, including visible light, that are characterized by their electric and magnetic fields. EMR can be categorized by different frequencies and wavelengths. One commonly experienced form of EMR is visible light, which enables us to see the world around us. Other types of EMR include gamma rays, X-rays, ultraviolet light, infrared, microwaves, and radio waves. Each of these helps in different technologies or medical applications.
Two common devices that use EMR and are related to health and operational safety (HERO) are microwave ovens and magnetic resonance imaging (MRI) machines. Microwave ovens use microwaves to heat food, while MRI machines use radiofrequency waves to create detailed images of the body, helping in medical diagnoses, such as locating brain tumors.
Examples of objects giving off EMR include the Sun, which produces a wide spectrum including visible, ultraviolet, and infrared radiation, and Wi-Fi routers, which emit microwaves.