Aim
Our aim is using a laser beam to investigate the critical angle for pure water or tap water, Investigate the effect of concentration on the refractive index using water with different concentrations of a particular substance. eg. Sugar
Introduction
We are required to write their practical investigation report for submission. The report should include a detailed analysis of the data collected through the entire experiment.
We should demonstrate the following abilities whilst conducting the experiment:
Use experimental apparatus and equipment appropriately
Make detailed and insightful observations and comments relevant to the experiment
be able to identify inconsistencies or possible inaccuracies from experimental data and design
be able to analyse and interpret data as it is collected to ensure that it is appropriate and accurate
Material
1. Laser
2. Pure water or tab water
3. Sugar
4. Paper
5. Spoon
6. Aquarium
7. Stand
8. Calculator
Method
1. Gather all the materials needed to.
2. Fill the aquarium with pure water, tap water or sugar water.
3. Than you need a laser beam, hit to the water surface
4. You need a paper to measure angels, steak one side of the paper to the laser and hold the other side with you hand and then make dot where the light hit and then draw the line join the dots.
5. Do the same thing with tap water,
6. And the same for water mixed with sugar.
7. Repeat two times for each to see the errors
Result or calculation
The results we got for our experiment are below 90
Pure water: I r Qi 55 55 35 35 water surface
