Electromagnetic Spectrum

Question 1

what is an electromagnetic wave?

Answer 1

a transverse wave consisting of oscillating electric and magnetic fields that oscillate 90 degrees to each other

Question 2

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Answer 2

Radio waves, Micro wave, Infrared radiation, visible Light, Ultraviolet radiation, X ray, Gamma ray

Question 3

Speed of EM waves

Answer 3

travel at same speed in vacuum, 3 x 10^8

Question 4

Do EM waves carry an electrical charge?

Answer 4

No

Question 5

Main uses of radio waves

Answer 5

radios, over-the-air television and communication

Question 6

Main uses of microwaves

Answer 6

microwave ovens, satellite television and Global Positioning System (gps)

Question 7

Main uses of infrared radiation

Answer 7

remote controllers, ear thermometers, intruder alarms

Question 8

main uses of visible light

Answer 8

optical fibres for medical uses and telecommunication

Question 9

main uses of uv radiation

Answer 9

sunbeds and sterilisation of equipment

Question 10

main uses of x-rays

Answer 10

radiological and engineering applications (RT, medical diagnosis through x-ray image, detecting flaws in heavy metal equipment)

Question 11

main uses of gamma rays

Answer 11

medical treatment (killing cancerous cells in radiation therapy)