Electromagnetic Waves

Question 1

Electromagnetic Wave

Answer 1

Form of a transverse wave that does not need a medium to travel. It is created by an accelerating charge that creates a changing electric field which in turn induces a changing magnetic field. This process continues on.

Question 2

How can EMW’s travel without needing a medium

Answer 2

Other waves travel thru vibration or particles but EMW’s travel thru electric and magnetic fields which can exist anywhere.

Question 3

Electromagnetic Radiation in increasing frequency and decreasing wavelength

Answer 3

Radio, Micro, Infra-red, Visible Light, UV, X-Ray an Gamma

Question 4

Gamma Rays

Answer 4

Kill bacteria in food, sterilise medical equipment

Question 5

X-Ray

Answer 5

Images of internal structures in body, studying atomic structure of materials

Question 6

UV

Answer 6

Tanning, fluorescent tubes, security marking on bank notes

Question 7

Visible Light

Answer 7

Vision, optical fibre

Question 8

IR

Answer 8

Heaters, Grills, TV remote controls, thermal imaging

Question 9

Micro

Answer 9

Satellite communication, cell phone communication, cooking

Question 10

Radio

Answer 10

Communication, broadcasting, radar