Investigating refraction in rectangular blocs

• What type of waves are electromagnetic waves?

  Transverse waves
• How do reflection and refraction of light affect our perception?

  They explain how people see images, color, and optical illusions
• What is the aim of the experiment investigating refraction in rectangular blocks?

  • To investigate refraction in rectangular blocks
  • To find out how refraction differs for different substances
• What is refraction?

  It is the process by which a wave changes speed and sometimes direction upon entering a different medium
• What is the angle of incidence?

  The angle between the normal and the incident ray
• What apparatus is needed to investigate refraction in rectangular blocks?

  A ray box, slit, lens, and a ruler
• How should the ray box be set up for the experiment?

  It should produce a narrow ray of light directed at the block
• What should be drawn on the paper to assist in the experiment?

  A straight line parallel to the longer sides of the paper and a second line at right angles labeled 'N' for normal
• What is the purpose of marking the path of the incident ray and the ray leaving the block?

  To show the paths of the light rays
• What should be done after removing the block in the experiment?

  Draw a line joining each cross to the point where the normal meets the block
• What is the analysis step in the experiment investigating refraction?

  • Compare the angle of incidence with the angle of refraction for each block
• How do the angles of refraction differ for various materials?

  They depend on the materials themselves
• What are the hazards associated with the ray box in the experiment?

  • Ray box gets hot (minor burns)
  • Semi-dark environment (increased trip hazard)
• What control measures should be taken for the hazards in the experiment?

  • Do not touch the bulb; allow time to cool
  • Ensure the environment is clear of potential trip hazards before lowering lights