Physics

• Describe what a transverse wave is

  Where the particle motion and wave motion are 90 degrees to each other.
• Give examples of a transverse wave

  Radio, Water, Light and Phone Signals
• Describe a longitudinal wave

  The particle and wave motion move in the same direction.
• What do waves transfer?

  Energy
• What is frequency?

  The frequency of a wave is the number of waves in 1 second.
• What is frequency measured in?

  Hertz (Hz)
• Label the equation: f=N/t

  f= frequency measured in hertz (hz)

  N= number of waves

  t= time measured in seconds (s)
• Label this diagram: T= 1/f

  T= The period of a wave measured in seconds

  1= The time taken for one wave to pass

  f= frequency measured in hertz (Hz)
• Give an example of a longitudinal wave

  Sound Waves
• What is the amplitude of a wave?

  The distance from the crest/trough to the middle of the wave
• What is the wavelength of a a wave?

  The distance between the same point on two different waves
• Label this equation: d=vt

  d= distance measured in meters (m)

  v= speed measured in meters per second (m/s)

  t= time measured in seconds (s)
• Label this equation: v=f λ

  v= speed measured in meters per second (m/s)

  f= frequency measured in hertz (Hz)

   λ= wavelength measured in meters (m)
• What is the definition of refraction?

  Refraction occurs when a wave passes from one material (medium) to another and the speed of the wave changes (which may cause the direction of the wave to change.)
• What happens when light enters glass? (AGT)

  The speed of the light decreases and it bends towards the normal
• What happens when light leaves glass? (GAA)

  The speed of the light increases and it bends away from the normal
• What is diffraction?

  When waves pass around an obstacle or pass through a gap, the waves bend.
• Does a short wavelength have less or more diffraction than a long wavelength?

  Long Wavelength= more diffraction

  Short Wavelength= less diffraction
• What’s the memory aid used for remembering the EMS Spectrum?

  Running Through Motherwell In Violet Underwear Xcites Grannies - Radio, TV, Microwaves, Infrared, Visible Light, UV, Xrays and Gamma Rays.
• Does the wavelength decrease or increase from radio to gamma?

  Decrease
• Label this equation A=N/t

  A= Activity measured in Becquerels (Bq)

  N= Number of Waves

  t= Time measured in seconds (s)
• Label this equation D=E/m

  D= Absorbed Dose measured in Grays (Gy)

  E= Energy Absorbed measured in Joules (J)

  m= Mass measured in Kilograms (Kg)
• Label this equation H=DWr

  H= Dose Equivalent measured in Sieverts (Sv)

  D= Absorbed Dose measured in Grays (Gy)

  Wr= Radiation Weighing Factor
• Label this equation H(dot)=H/t

  H(dot)= Dose Equivalent Rate measured in Sv/hour, Sv/day, Sv

  H= Dose Equivalent measured in Sieverts (Sv)

  t= Time measured in seconds (s)