Practical

• What is the independent variable?

  Frequency of the waves
• What is the Dependant variable?

  Wavelength and wave speed
• What are the control variables?

   Depth of water in ripple tank, shape of ripple tank and the shape of the object creating the waves
• What Apparatus do you use to measure the speed of sound?

  Oscilloscope
• What is the apparatus used to measure the speed of ripples?

  A strobe light
• What apparatus is used to determine the infrared radiation investigation?

  Leslies Cube
• How are leslies cube used?

  To determine how much infrared radiation is emitted from different surfaces
• What are the different surfaces of a leslies cube?

  White, Shiny metallic , Shiny black , matt black