Reflection Lab

Reflection Lab - Reflection, Refraction Lab Abstract The...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Reflection, Refraction Lab Abstract The purpose of this lab was to investigate the phenomenon of refracted and reflected light by experimentally determining the index of refraction for an acrylic substance. In each part of the experiment, a HeNe laser beam was aimed through a semicircular acrylic disk, which was placed on top of a ray table base. In part 1, the index of refraction was found using Snell’s Law. The angle of refraction was compared to the angle of incidence graphically to provide an index of refraction of 1.45+/-0.01 degrees. Part 2 used the critical angle, the angle at which the refracted ray disappears, to calculate an index of refraction of 1.47+/-0.02 degrees. Part 3 used Brewster’s angle, the angle at which the refracted and reflected rays are at a right angle, to calculate an index of refraction of 1.54+/-0.06. Parts 2 and 3 agreed with the accepted value of 1.49, but the index of refraction determined in part 1 did not agree with this accepted value. This discrepancy may be due to the fact that the acrylic disk may have moved while rotating the base table, thus providing inaccurate data. Data, Results, Graphs 1. Graph for Refraction1 from Table 1. (JPG or GIF file only). 2. Graph for Refraction2 from Table 1. (JPG or GIF file only). Upload File Numerical Results 1. Index of refraction from Part 1 (Snell’s law). The equations for the weighted average of the two values of the index of refraction are included on the attached excel document. The index of refraction was 1.45+/-0.01. 2. Index of refraction from Part 2 (Critical angle). The critical angle for acrylic was 42.75 with uncertainty of 0.5 degrees.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Reflection Lab - Reflection, Refraction Lab Abstract The...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online