• 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...


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.















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.


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 american bulb making company GE (General Electric) opted to close its plant in Winchester. 200 workers were fired (Kolom). They decided against changing the plant and producing CFL's as the manufacturing cost and cost for labour was too high. The same scenario is likely to happen in other incandescent light bulb factories which create a demand and cheaper labour in still developing countries.

  2. Measuring the refractive index of mineral water using the critical angle

    Then we attached this paper to the bottom of the cup, so that the point we marked was at the place of the real center of the vessel. Having the cup ready, we fastened the laser pointer to the tripod, which would free our hands and enable us to write down our observations immediately.

  1. HL Physics Revision Notes

    The thin lens formula is 1/f = 1/u + 1/v Apply the convention ?real is positive, virtual is negative? to the thin lens formula i.e. for a virtual image, the image distance will be negative, i.e. it is one the same side as the lens The simple magnifying glass: Define

  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. Investigating optical properties of Jelly.

    Moreover, the angle of emergence (e) was confirmed to be 45o before recording r. Type of Jelly Different Jellies have different optical density hence, different refractive indexes. The same Jelly (brand and flavor) was taken for all the experiments. A large portion was initially made from which slabs were cut later on.

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

    refractive index of water, slope of worst line with greatest slope gives the maximum value of refractive index of water and the worst line with least slope gives the minimum value of refractive index of water in this experiment. Uncertainty of refractive index of water : Percentage error calculations: CONCLUSION

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