• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Index of Refraction lab

Extracts from this document...

Introduction

Ankit Shahi                Jan 06 2009

Index of Refraction

The aim of the experiment is to find the index of refraction, n , of the plexiglass. This would be done by passing a ray of light at the plexiglass, at a certain angle, and then recording the angle at which it refracts back into the air. The angle incident to the plexiglass and the refracted angle would be measured by the graph paper that would be placed beneath the plexiglass.

When light enters a more optically dense medium, the ray bends toward the normal to the surface inside the medium. This is true for all angles greater than zero. However when the light enters a less optically dense medium, the refracted ray bends away from normal.

To find the index of refraction of plexiglass, n, the graph of the

...read more.

Middle

150

30

144

50

129

60

119

70

112

80

100

90

90

Calculating the sin of the incident angle and the refracted angle:

sin(10°) = 0.1736481777 = 0.17

Sin (173°) = 0.1218693434 = .12

The error of the sin of the angles is exempt

Table #2: Sin value of the incident angle and the refracted angle

...read more.

Conclusion

There were some weaknesses found in the lab. One weakness found was that that it was hard to keep the plexiglass at the same place. This could be solved by putting the plexiglass at a fix distance so that it won’t move. Another weakness was that the plexiglass had too many scratches and it was also dirty. This could have affected the results. This could be solved by either cleaning the lens with the lens cleaner or get a new glass.

...read more.

This student written piece of work is one of many that can be found in our International Baccalaureate Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Physics essays

  1. Investigating How The Index Of Refraction Is Affected By Different Temperatures Of Water

    Line the ray from the ray box with the 20� angle. The ray being emitted from the ray box must be pointed towards the convex side of the Plexiglas and then make sure that the ray is pointes towards the exact center of the protector .

  2. The Refraction of Light Lab

    More specifically, since in our experiment we are dealing with specifically water as our medium, I believe that we should be able to obtain the refractive index for water, which is 1.333. On the left is a table of common refractive indices.

  1. Incandescent 100 watt light bulb ban: A bright Idea ?

    The biggest problem with CFL's is that they are a health hazard. CFLs have mercury in them, an average of 5 milligrams a bulb (Ask Us: FAQs - Compact Fluorescent Light Bulbs) . Mercury is one of the most toxic elements on Earth.

  2. Pendulum Lab

    Force- The force imparted on the pendulum will change the velocity and thus the period of the pendulum. In this experiment no force was imparted on the bob during the trials, the only force present was gravity which was constant throughout the experiment.

  1. Finding the Index Of Refraction

    Trials Sin(Angle of Incidence) � 0.04 Sin(Angle of Refraction) � 0.04 1 0.34 0.28 2 0.39 0.33 3 0.47 0.39 4 0.60 0.50 5 0.68 0.57 6 0.74 0.67 7 0.77 0.66 8 0.84 0.72 Uncertainty calculated by taking the range of highest possible values to lowest possible angle values and taking their average which resulted in � 0.04

  2. Light Intensity Investigation

    Repeat the above step twice, ensuring that only the highest reading is recorded for each of the two remaining trials. Ensure that the control variables are the same as they were for the trial before with outside interference minimized so that the illuminated light measurements (the dependent variable)

  1. In this experiment, a mechanism is prepared to observe the refraction of light and ...

    This phenomenon is known as refraction. For example, if you look straight down at an object at the bottom of a glass of water, it looks closer than it really is.

  2. Investigating optical properties of Jelly.

    and the angle of refraction (r). Controlled Variables: Variable Controlled Purpose of Controlling Method of Controlling Thickness of Jelly Increase in thickness will lead to an increase in the lateral displacement, as a result of which, the angle of refraction (r) will change. A cuboid of Jelly of the same dimensions was cut out using a sharp brimmed rectangular bowl.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work