Required Practical 9: Reflection and Refraction (T)

• What are the two phenomena being investigated in this practical?

  Reflection and refraction of light
• What equipment is used to investigate reflection and refraction in this practical?

  • Ray box
  • Lens
  • Slit
  • Glass block
  • Protractor
  • A3 paper
• Why is it important to switch off the ray box when not in use?

  To prevent overheating and ensure safety
• What is the normal in the context of this experiment?

  The line drawn at right angles to the surface where the light hits
• What is the incident ray?

  The ray of light that hits the surface of the block
• How is the angle of incidence defined?

  The angle between the incident ray and the normal
• What happens to the light ray when it hits the glass block?

  It reflects and transmits through the block
• What is the relationship between the angles of incidence and reflection for different materials?

  • Angles of incidence and reflection are the same for both glass and perspex.
  • They do not depend on the material.
• How does the angle of refraction differ between materials?

  It is different for different materials
• What should be done after measuring the angles in the experiment?

  Draw the paths of the incident, reflected, and transmitted rays