Waves

Question 1

Uses of radio waves?

Answer 1

Radio
Television transmissions
Astronomy
Radio frequency indentification (RFID)

Question 2

Uses and disadvantages of microwaves?

Answer 2

Satellite television
Mobile phones
Microwave ovens
Wi-Fi

DISADVANTAGE
Internal heating of body cells

Question 3

Uses and disadvantages of infrared?

Answer 3

Electric grills
Short range communications - remote controllers for tv’s
Intruder alarms
Thermal imaging
Optical fibres

DISADVANTAGE
Skin burns

Question 4

Uses of visible light?

Answer 4

Vision
Photography
Illumination

Question 5

Uses and disadvantages of ultraviolet?

Answer 5

Security marking
Detecting fake bank notes
Sterilising water

Disadvantages
Damage to surface cells and eyes, leading to skin cancer and eye condition.

Question 6

Uses and disadvantages of X-rays?

Answer 6

Medical scanning
Security scanners
Can kill cancer cells

DISADVANTAGES
Mutation and cancer
Damage body cells

Question 7

Uses and disadvantages of gamma rays?

Answer 7

Sterilising food and medical equipment
Detection of cancer and treatment

DISADVANTAGES
Mutation and damage to body cells

Question 8

What wave is used to communicate with satelites

Answer 8

Microwaves.
Some phones use low orbit artificial satellites
Some phones and direct broadcasting satellite televisions use geostationary satellites