Electromagnetic Waves Flashcards

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1
Q

Electromagnetic Wave

A

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.

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2
Q

How can EMW’s travel without needing a medium

A

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

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3
Q

Electromagnetic Radiation in increasing frequency and decreasing wavelength

A

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

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4
Q

Gamma Rays

A

Kill bacteria in food, sterilise medical equipment

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5
Q

X-Ray

A

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

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6
Q

UV

A

Tanning, fluorescent tubes, security marking on bank notes

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7
Q

Visible Light

A

Vision, optical fibre

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8
Q

IR

A

Heaters, Grills, TV remote controls, thermal imaging

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9
Q

Micro

A

Satellite communication, cell phone communication, cooking

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10
Q

Radio

A

Communication, broadcasting, radar

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