IG Phy – Uses of Eectromagnetic Waves (II)

Fluorescent materials absorb energy from visible light waves and re-emit the energy as ultraviolet light.

X-rays can pass through bones but not through flesh.

Gamma rays are used for sterilizing food and medical equipment.

Gamma rays are produced by changes taking place in the nuclei of some atoms.

Exposure to intense sunlight can damage the cells in our eyes.

Microwaves are used for satellite communications.

Geostationary satellites orbit the Earth in 12 hours.

Mobile phones use visible light for communication.

Bluetooth technology uses radio waves for short-distance communication.

Optical fibers use either visible or infrared light for transmitting information.

Digital signals have two possible values, high and low.

Infrared waves are used in medical imaging to detect temperature differences in the body.