Electromagnetic Waves/Spectrum

Question 1

Name the electromagnetic spectrum in order

Answer 1

(starting with longest wavelength, lowest frequency and lowest energy)

• Radio
• Microwaves
• Infra-red
• Light
• UV
• X-Rays
• Gamma

Question 2

what is white light?

Answer 2

the 7 colours of the spectrum

• red
• orange
• yellow
• green
• blue
• violet
• indigo

Question 3

what do Electromagnetic waves transfer?

Answer 3

Energy

Question 4

what are the uses and dangers of radio waves?

Answer 4

Uses Dangers

• radio - None
• Tv signals

Question 5

what are the uses & dangers of microwaves?

Answer 5

Uses Dangers

• phones-communication -high frequency can cause burns
• heating food

Question 6

Uses and dangers of Infra-red radiation

Answer 6

Uses Dangers

• heaters - can cause burns
• cameras

Question 7

Uses & dangers of visible light

Answer 7

Uses Dangers

• to see - can cause blindness
• Photography

Question 8

Uses & disadvantages of UV

Answer 8

Uses Dangers

• tanning-UV beds - skin cancer
  - can cause blindness

Question 9

Uses & disadvantages of X-Rays

Answer 9

Uses Dangers

-observe bodies -can cause cancer with high exposure

Question 10

Uses & disadvantages of Gamma

Answer 10

Uses Dangers

• kill cancer cells - cancer growth
• kill harmful bacteria in food - exposure-destroy cells

Question 11

what are optical fibres?

Answer 11

Long thin tubes

Question 12

How are radio waves produced?

Answer 12

Long wavelengths that can be transmitted