Waves Flashcards
Uses of radio waves?
Radio
Television transmissions
Astronomy
Radio frequency indentification (RFID)
Uses and disadvantages of microwaves?
Satellite television
Mobile phones
Microwave ovens
Wi-Fi
DISADVANTAGE
Internal heating of body cells
Uses and disadvantages of infrared?
Electric grills
Short range communications - remote controllers for tv’s
Intruder alarms
Thermal imaging
Optical fibres
DISADVANTAGE
Skin burns
Uses of visible light?
Vision
Photography
Illumination
Uses and disadvantages of ultraviolet?
Security marking
Detecting fake bank notes
Sterilising water
Disadvantages
Damage to surface cells and eyes, leading to skin cancer and eye condition.
Uses and disadvantages of X-rays?
Medical scanning
Security scanners
Can kill cancer cells
DISADVANTAGES
Mutation and cancer
Damage body cells
Uses and disadvantages of gamma rays?
Sterilising food and medical equipment
Detection of cancer and treatment
DISADVANTAGES
Mutation and damage to body cells
What wave is used to communicate with satelites
Microwaves.
Some phones use low orbit artificial satellites
Some phones and direct broadcasting satellite televisions use geostationary satellites