Determine the refractive index of glass

Hypothesis The incident ray, the normal and the refracted ray all lie in the same plane. Also, according to Snells law, for 2 particular media, the ratio of the sine of the slant of incidence to the sine of the tippytoe of refraction should be a unvaryingSin iSin rApparatus1. A impertinent prism2. Four 1 inch pins3. A protractor4. A linguistic rule5. An A4 size unreal6. An A4 size sheet of plain musical composition7. 4 bits of blue tack8. A pencilMethod1. A circumvent is drawn at the top left side of the A4 size paper with column titles Angle of Incidence and Angle of Refraction. The table should blockade 8 rows excluding the column titles.2. The rectangular prism is placed at the core of the top of the page and its border is traced with the help of the ruler and pencil. The normal is before long after marked out in the approximate centre of the allowance using the protractor at the 90 degrees point. The operation is then repeated at the middle of the bottom of the page a nd finally to the back of the page.3. 4 perimeters with a normal on each should already be drawn at that stage. Next, an angle should be measured and traced from the point where the normal touches the perimeter eminence from either of the 4 sketch. The angle is noted at the table as an angle of incidence. This step is repeated five more times with dissimilar angles each time.4. The page is placed on the piece of cardboard and stabilize using the blue tack bits.5. 2 pins atomic number 18 stuck on any incident lines and the rectangular prism in placed fitting the perimeter marked previously.6. The pins should be observed at a parallel and frigid side of the rectangular prism and the cardboard should be moved so that 1pin covers the other totally and 2 more pins should be stuck.7. The pins are distant together with the page and a line is drawn from the 2 late holes caused by the pins.8. A newborn normal is outlined out of the new line and the angle is measured and noted as the emergent ray.9. A line is drawn from the emergent ray to the incident ray and the angle from the normal is measured using the protractor.10. Steps 4 to 8 are repeated 7 more times varying on the 4 perimeters.11. The page should resemble the followingResultsConclusionThe results seem satisfying adequate to support the hypothesis, hence supporting the idea of the law of refraction.Evaluation and precautions* unrelenting tack was used so as to keep the paper lasting while working to prevent errors.* A double check with some other protractor was performed to ensure its accuracy.* Mistakes such as not perfectly vertical pins stuck or not exactly parallel posture of the eye could have been performed relying on the results.* Parallax errors or other mistakes such as too bumpy cardboard may have lead to not accurate enough results.* some other method of performing the experiment yet roughly the same preciseness would be to use light beams which would be more accurate than our eyes po sitioning therefore reducing parallax error.