Depth Study for Waves

Your task is to investigate the refractive index of a glass sample in order to identify the type of an unknown glass block by using Snell’s Law and graphing measured data.

You are required to complete a Depth Study of 9 hours in-class work and submit a report on the refractive index of a sample glass block.

This task is completed in three parts: researching, writing a method and undertaking a practical investigation.

Part A: Researching Refraction

1. Define refraction.
2. Define refractive index and explain how it relates to optical density.
3. Identify which wave characteristics change when it refracts and which do not change.
4. Describe, with the aid of a diagram, each of the following:
   1. Refraction of light
   2. Refraction of sound
   3. Refraction of surface water waves
5. Analyse the advantages and disadvantages of Fresnel lenses. You may begin with the information at Advantages of Fresnel Lenses in order to start your analysis.

Use in-text citation to reference your answers and provide an appropriately presented bibliography.

Part B: Writing a Method

In class, you will be required to develop a valid procedure to fulfil the task above, including steps that will ensure good reliability, and write an appropriate risk assessment.

THIS IS SUBMITTED PRIOR TO STARTING THE INVESTIGATION.

Part C: Undertaking a Practical Investigation

In class, you will individually carry out an investigation by following a SUPPLIED METHOD to find the refractive index of an unknown substance. You will gather and present data, analyse the data to determine the refractive index and analyse the processes you have undertaken. Then submit a report on your practical investigation for marking.