Which of the following statements about X-rays is correct?
  • X-rays cause electric and magnetic fields to vibrate at 90o to the direction they are travelling
  • X-rays are longitudinal waves
  • X-rays are transverse waves only after being reflected
  • X-rays become transverse waves when they are refracted by certain crystals
The distance from any point on one wave to the same point on the next wave is called what?
  • The amplitude
  • The frequency
  • The modulation
  • The wavelength
What is the amplitude of a transverse wave?
  • The height of the wave from the centre line to the crest
  • The height of the wave from the centre line to the trough
  • The maximum displacement of a wave
  • What is measured using a voltmeter and ammeter
Which of these statements about the frequency of a transverse wave is true?
  • The frequency of a transverse wave is related to wavelength by the wave equation
  • The frequency of a transverse wave is measured in Hertz (Hz)
  • The frequency of a transverse wave is the number of waves passing a given point in 1 second
  • All of the above
As transverse seismic waves pass through the Earth, they must travel through several different layers. These layers have different densities. What happens to these waves when they reach a boundary between the layers?
  • They are blocked
  • They reflect and refract
  • They reflect only
  • They refract only
When drawing a diagram to measure the angle of refraction, a student drew a broken (dashed) line at right angles to the boundary. What is the name of this line and which way would the wave refract?
  • Normal, towards the normal
  • Ordinary, away from the ordinary
  • Standard, towards the standard
  • Normal, you need more information
Why do transverse waves refract when they enter a more dense medium?
  • They slow down
  • They speed up
  • They are deflected by the more dense particles
  • The normal attracts them
Under what conditions does refraction take place?
  • When the wave has a long wavelength
  • If the wave is travelling at less than the speed of light
  • If the angle of incidence is 90o
  • When the wave has already been refracted somewhere else
When a transverse wave passes through a gap that is about the same width as its wavelength, which of the following is true?
  • It slows down
  • It diffracts
  • Its wavelength is not affected
  • It can produce an interference pattern on a screen
Which of the following answers places these waves of the electromagnetic spectrum in the correct order of ?Visible lightRadio wavesMicrowavesUltra violetInfrared
  • 1, 2, 3, 4, 5
  • 2, 3, 5, 1, 4
  • 5, 4, 2, 1, 3
  • 3, 2, 4, 5, 1
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