waves

• Who is demonstrating the GCSE physics practical?

  1. Reese
• What is the purpose of the practical demonstration?

  To measure the speed of waves
• What equipment is used to measure the speed of a water wave?

  A ripple tank
• How does the oscillator function in the ripple tank?

  It creates waves by moving up and down
• What type of wave is produced in the ripple tank?

  A transverse wave
• What is the role of the mirror in the ripple tank setup?

  To reflect light towards the camera
• Why are the lights turned off during the experiment?

  To see the waves clearly on the screen
• What does the strobe light do in the ripple tank experiment?

  It makes the waves appear stationary
• What frequency is the oscillator set to in the demonstration?

  50 Hertz
• What is the wave equation mentioned in the demonstration?

  V = F λ
• How is the magnification of the image calculated?

  By dividing image size by actual size
• If the image size is 18 cm and the actual size is 8.6 cm, what is the magnification?

  2.1
• What should be done to the wavelength measured on the screen?

  Divide it by the magnification factor
• What is the significance of measuring multiple wavelengths?

  To obtain accurate and reliable results
• What is the distance measured for ten wavelengths at 50 Hertz?

  11.7 cm
• What happens to the wavelength as the frequency decreases?

  The wavelength increases
• What is the wavelength measured at 40 Hertz?

  1.38 cm
• What is the wavelength measured at 30 Hertz?

  1.71 cm
• What is the relationship between frequency and wavelength in waves?

  They are inversely proportional
• What is the frequency at which the first standing wave is observed on the string?

  14 Hertz
• What is the significance of nodes and anti-nodes in standing waves?

  Nodes are points of no movement
• How long is the string used in the standing wave experiment?

  1 meter
• How is the wavelength related to the length of the string for standing waves?

  Half the length equals half a wavelength
• If the length of the string is 1 meter and it has one loop, what is the wavelength?

  2 meters
• What is the frequency when there are two loops on the string?

  30 Hertz
• How do you calculate the wavelength when there are three loops on the string?

  Length divided by three
• What is the frequency when there are five loops on the string?

  88 Hertz
• What should be plotted on the graph to find wave speed?

  Frequency against reciprocal of wavelength
• What does the gradient of the graph represent?

  The speed of the wave
• How can you find the average speed of the wave on the string?

  By averaging frequency times wavelength
• What is the aim of the experiment using a ripple tank?

  To identify the suitability of apparatus for measuring waves
• How does changing the frequency of waves affect their properties?

  It affects their speed and wavelength
• What apparatus is used to produce waves in the experiment?

  A vibrating paddle connected to a signal generator
• What are the variables in the ripple tank experiment?

  • Independent variable: Frequency of waves
  • Dependent variables: Wavelength and wave speed
  • Control variables:
  • Depth of water in ripple tank
  • Shape of ripple tank
  • Shape of the object creating the waves
• What is the independent variable in the ripple tank experiment?

  Frequency of waves
• What are the dependent variables in the ripple tank experiment?

  Wavelength and wave speed
• Why are control variables important in the experiment?

  To ensure a fair test and accurate results
• What control variables are mentioned for the ripple tank experiment?

  Depth of water, shape of tank, shape of object
• What is the purpose of using a ripple tank in this experiment?

  To explore wave properties and their relationships
• How does the ripple tank help in understanding wave behavior?

  It visually demonstrates the connection between wave properties