Electromagnetic waves Flashcards

1
Q

What type of waves are EM waves

A
  • All EM waves are transverse waves
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2
Q

What is the same about all EM waves

A
  • All EM waves travel at the same speed
  • This is 3 x 10^8 m/s in a vacuum
  • This speed varies in different mediums (refraction)
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3
Q

What differentiates different EM waves

A
  • All EM waves have different wavelengths and frequency
  • These two are inversely related (as one increases, the other decreases)
  • This means that the speed is always the same of all waves
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4
Q

What is the entire EM spectrum

A
  • Radio waves
  • Microwaves
  • Infrared waves
  • Visible light
  • Ultraviolet
  • X-rays
  • Gamma rays
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5
Q

Which waves are used in communication

A
  • Radio waves
  • Microwaves
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6
Q

Which waves are considered ionising

A
  • Ultraviolet
  • X-rays
  • Gamma rays
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7
Q

What is visible light

A
  • Light that can be seen by the human eye
  • All of the colours
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8
Q

Where do EM waves come from

A
  • EM waves come from everywhere
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