# The Refractive Index

The refractive condemnation Aim: The aim of this test is to discover the refractive condemnation of a glass prism. In this test, the recalcitrant triumphring is the determination of stroke, and the resting triumphring is the determination of disradiation. Theory: Snell’s law relates the determination of stroke and disradiation to the reference of the quickness of the triumph in the unanalogous resources. The formula for Snell’s law is the following: Sin isinr = v1v2 = n Where i is the determination of stroke, r is the determination of disradiation and v1 and v2 are the velocities of the triumph in unanalogous resources and n is the refractive condemnation. Light refracts when it passes from one balance to another. The reference of the quickness of digestible in the two resources is determined the refractive condemnation. Materials and order: For this test we used a half glass divergence sturdy on the courage of a laminated monograph delay a drawn divergence encircling it, a blue/violet laser delay a triumphlength 447nm and a cope arrest. First we launched by placing the insipid aspect of the half glass divergence sturdy to the monograph in front of the laser. Depending on the determination we wanted to discover, we used the drawn divergence on the monograph to run where to put the laser on the half aspect of the drawn divergence. The determinations of stroke we used were 10°, 20°, 30°, 40°, 50° and 60°. First we meted the determination of stroke, where we placed the cope arrest standing-upright to the ray. To coerce the triumphrings, the laser should enjoy the identical triumphlength for all the determinations to get the identical refractive condemnation and the ray should hit the courage of the glass divergence, so to restrain that the ray hits the courage of the glass divergence, we placed a cope arrest at the determination of reflecting to see if the determination of reflecting is the identical as the determination of stroke, owing we perceive that the determination of stroke is similar to the determination of reflecting. Another art which makes it easier to hit the courage of the glass divergence is by placing a monograph on the insipid aspect of the divergence and see if the ray hits the courage of the divergence and by placing the cope arrest standing-upright. Then we meted the determination of the disradiation on the other half of the drawn divergence, where we recurrently placed the cope arrest standing-upright. We meted the determination of disradiation by looking standing-upright down from the cope arrest, to see hinder where the ray hits the cope arrest, to see further considerate where the determination of disradiation is. We recurrent this order for all the unanalogous determinations of stroke and recurrent whole determination two times. D 2 1 2 You transcribe “to coerce the triumphrings” which triumphrings? You should remark the triumphlength and the hitting the courage distinctly as triumphrings to be coerceled and why. Conclusion: From the board we can see that there is no interim, where at last one reckon from each interim is moderate. The consequences of the little determinations are further careful than the bigger determinations. Snell’s law propounds that no stuff what the determination of stroke is, the refractive condemnation would be the identical. From the ends I gained (careless the determination of stroke similars to 10°), I can propound that Snell’s law is confirmed in this instance. Evaluation: The order has some weaknesses. The glass prism is not considerately in the courage of the drawn divergence, which is why the ends are not totally set-right. There energy too be some mislection when lection the little determinations, that has leaded to that the little determinations of stroke’s ends are a bit rare and approximately an outliers, but overall lection the determinations could be one of the errors too. Suggestions: It would be reform to glue the glass prism further considerate in the courage of the divergence, so that the end would be further considerate. Another art to emend the order is by using a Vernier probe to mete the greatness of little distances further considerate. CE 1 2 2 The one owing the aim of the red passage is not clear! Very well-behaved, this is your best up to now. gait 7