Page 51 - WAVES
P. 51
Electromagnetic Sources Applications
wave
Ultraviolet rays Sun, mercury • Stimulates the formation of vitamin D Detect
vapour lamp, hot fake notes
objects • Fluorescent lamp
• Sterilization of surgical tools
Visible light Flames, lamps, • Visual communication
the sun • Photography
• Photosynthesis
Infrared radiation Hot objects such as • Thermal imaging and physiotherapy
flames, human body, • Infrared binoculars for night time vision. IR
sun radiation emitted by a living thing can be
detected.
• Remote control for TV / VCR
Microwaves Radar transmitter • Communication system with satellites
Microwaves oven • Used in radar system
• Cooking
• Cellular (mobile) phone service
Radio waves Electrons oscillating • For broadcasting and wireless
circuit in aerials communication
• UHF (ultra high frequency) radio waves –
television and hand phones
• VHF (very high frequency) radio wave – local
radio FM and wireless communication used
by the police
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