Physics

• What is a transverse wave?


  A wave where the particles move up and down perpendicular to the direction of travel
• What is a longitudinal wave?

  A wave where the particles move parallel to the direction of travel
• What kind of wave is a sound wave?

  Longitudinal
• What kind of wave is a water wave?

  Transverse
• What is wave frequency?

  Number of waves per second.
• What is the wavelength of a wave?

  The distance from a point on one wave to a point in the same position on the next wave
• What is the amplitude of the wave?

  The maximum distance of a point on the wave away from its rest position, measured in metres
• What is the velocity of a wave?

  The speed of the wave in the direction it is travelling
• Do waves travel at the same speed in different materials?

  No
• What are properties of an electromagnetic waves?

  Transverse a do not need a medium to travel through
• How big is an atom?

  1 x 10^-10m
• How big is an electron?

  1.55 x 10^-23
• What is total internal refraction?


  When the light is completely reflected inside the glass
• What is the critical angle?

  The angle of incidence at which light is refracted at an angle of 90 degrees.
• What do S waves stands for?

  Secondary
• What do P waves stand for?

  Primary waves
• What is needed to stop beta particles?

  3mm aluminium
• What is needed to stop gamma rays?

  lead a few cm thick
• what is needed to stop alpha particles?


  a few cm of air or a piece of paper