Electromagnetic Waves

Question 1

Definition of electromagnetic waves

Answer 1

They are transverse waves. That travel at the same same speed through a vacuum or air. They composed of oscillating electric and magnetic fields

Question 2

List the electromagnetic spectrum from long wave length to short and from low frequency to high frequency

Answer 2

Radio 
Micro 
Infra red 
Visible light 
Ultra violet 
X-rays 
Gamma rays

Question 3

Example of a radio wave / hazards

Answer 3

Television /Radio

Can cause cancer and leukaemia

Question 4

Examples of micro waves /. Hazards

Answer 4

Cooking food , satellite communication

Can cause internal heating of body tissues

Question 5

Examples of infer red / Hazards

Answer 5

Electrical heaters

Can cause burns

Question 6

Examples of visible light / harazeds

Answer 6

Lasers/ fibre optic lights

Can damage the back of your eyes

Question 7

Examples of ultra violet / hazards

Answer 7

The sun

Damage to skin cells can lead to skin cancer

Question 8

Examples of x rays/. Hazards

Answer 8

X rays

Damage to body cells

Question 9

Examples of gamma rays/ hazards

Answer 9

Medical imaging and treatments

They cause damage to the body cells can also cause cancer

Question 10

What speed does electromagnetic waves travel at

Answer 10

3 x 10 to the power of 8 m/s