Electromagnetic Spectrum Properties And Uses

Question 1

Radio Properties

Answer 1

Longest Wavelength, no known dangers

Question 2

Radio Uses

Answer 2

Radio ad. television signals

Question 3

Microwave properties/Dangers

Answer 3

Short wavelength.

Some concern that they pose a health risk to phone users. Absorbed by water molecules.

Question 4

Micro Uses

Answer 4

Heating food, satellite and mobile phone communication.

Question 5

Infrared properties/dangers

Answer 5

Longer wavelength than visible light.

Can burn if too much exposure.

Question 6

Infrared (thermal radiation) Uses

Answer 6

Transmitting info In optician fibres, remote controls and infrared cameras.

Question 7

Visible light Dangers

Answer 7

If light is too bright I can damage retina

Question 8

Visible light Uses

Answer 8

Photosynthesis, lasers in CD players

Question 9

Ultraviolet Properties/Damages

Answer 9

Can ionise cells in the body leading to skin cancer

Question 10

Ultraviolet Uses

Answer 10

Sun tan beds, detecting forged bank notes

Question 11

X-rays Dangers

Answer 11

Ionising -> Cancer

Question 12

X-Rays Uses

Answer 12

Medical imaging, inspection of metal fatigue and airport security.

Question 13

Gamma Properties/Dangers

Answer 13

Most ionising in the EM Spectrum because they have the most energy.

Question 14

Gamma Uses

Answer 14

Cancer Treatment -> killing cancer cells and sterilising medical equipment or food.

Question 15

Common properties of EMS

Answer 15

Transfers energy from one place to another
Transverse
Travels same speed in vaccumn (3*10^8m/S)