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

Investigating optical properties of Jelly.

Extracts from this document...


´╗┐Candidate Name: Session: May 2015 Page | International Baccalaureate Diploma Program (IBDP) Session: May 2015 Physics HL Lab Report Lab Report Title: Investigating optical properties of Jelly. Criteria Assessed: * Design (D) Candidate Name: Candidate Number: International School, Singapore RESEARCH QUESTION: What is the relationship between the temperature and the refractive index of Jelly? INTRODUCTION: When a beam of light of any wavelength travels, it bends towards or away from its normal and this phenomena is known as refraction. The refractive index, n, is given:. While travelling from less to a more optically dense medium, the beam of light slows down and bends towards the normal and while travelling from a dense to a less optically dense medium, the beam of light speeds up and bends away from the normal. Strawberry Jelly is an optically denser medium compared to air and hence, when an incident beam of light travels from air into the Jelly, it slows down and bends towards the normal. In this investigation, the refractive index of a translucent cube of strawberry Jelly is investigated. Regardless of the ingredients, Jelly is formed by crystallization and the rigidity of the structure of the crystals is dependent on its temperature. Thus, the temperature can alter the optical density of Jelly as a result of which, the refractive index of the translucent cube of Strawberry Jelly changes with temperature. ...read more.


APPARATUS AND CHEMICALS: Serial No. Name Uncertainty (if any) Capacity OR Quantity Purpose 1. Jelly - Excess To investigate its refractive index. 2. Sharp brimmed rectangular bowl - 1 To cut equal dimensions of Jelly cuboid for each experiment. 3. Low walled rectangular bowl - 1 To hold the cuboid of Jelly while light is being passed through it. 4. White paper board - 1 To function as the plane of refraction. 5. Board pins - 6 To mark the positons of the incident and refracted rays. 6. Protractor ±0.5o 1 To measure the angles of incidence and refraction. 7. Pencil and Ruler - 1 To trace the path of the beam of light. 8. Electronic water bath - 1 To change the temperature of the Jelly and stably maintain it. 9. Thermometer ±0.25oC 1 To check the temperature of the Jelly. PROCEDURE: 1. Excess of the same kind of Jelly was prepared by following the manufacturer’s instruction at the back of the packaging. 2. The white paper board was laid out flat on the work table and the low walled rectangular bowl was placed on top of it. 3. Using a pencil and a ruler, the low walled rectangular bowl was traced out on the white paper board. 4. With a pencil, ruler and the protractor, an incident ray was drawn on one side of the traced rectangle. 5. ...read more.


3. Ensure pins are not too thick and they are not bent. 4. While tracing the path of the pins, adjust height of viewing to ensure no parallax errors. Preferably, close one eye to isolate unnecessary lights. 5. Ensure thickness of cling film is negligible as it can have its own refractive properties. 6. Ensure straight lines for the rays and make sure the normal line drawn are parallel to the other. 7. Make sure that pins are appropriately spaced apart so that a more accurate determination of angle is allowed. Labelled Diagrams: Figure 1: Setting up Jelly onto high-walled rectangular bowl. Figure 2: The different parameters of the experiment. RAW DATA COLLECTION: (Sample) Temperature (°C) ± 0.25oC Angle of Incidence / i (o) ± 0.5o Angle of Refraction / r (o) ±0.5oC Trial 1 Angle of Refraction / r (o) ±0.5oC Trial 2 Angle of Refraction / r (o) ±0.5oC Trial 3 Angle of Refraction / r (o) ±0.5oC Trial 4 Angle of Refraction / r (o) ±0.5oC Trial 5 10.0 45.0 20.0 45.0 30.0 45.0 40.0 45.0 50.0 45.0 RAW DATA PROCESSING: (Sample) Temperature (°C) ± 0.25oC Angle of Incidence / i (o) ± 0.5o Angle of Refraction / r (o) ±0.5oC Average sin i sin r Refractive index (n) 10.0 45.0 20.0 45.0 30.0 45.0 40.0 45.0 50.0 45.0 The values for temperature can be plotted against Refractive index (n); refractive index on the y-axis and temperature of the Jelly on the x-axis. ...read more.

The above preview is unformatted text

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´┐Ż 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 purpose of this experiment is to determine the refractive index of Perspex plastic. ...

    Calculating the uncertainty for The uncertainty for y when y = is, where is in radians, and the uncertainty is rounded to 1 significant figure. Example for angle of incident at 0.17r (which has an uncertainty of 0.02r) Graphing: Graph 1.

  1. The Refraction of Light Lab

    Actual Refractive Index value for water - Average sin i / sin R Actual Refractive Index value for water x 100 = 1.34 - 1.333 1.333 x100 = 0.53 % The percentage error in our experiment was a very small 0.53 % Conclusion: With regards to my hypothesis, I believe

  2. Physics Wave revision question

    This question is about sound waves. A sound wave of frequency 660 Hz passes through air. The variation of particle displacement with distance along the wave at one instant of time is shown below. (a) State whether this wave is an example of a longitudinal or a transverse wave.

  1. Lab Report " Investigating the Physics of Road Safety

    Potential Energy (PE), we used the following formula: PE = mass (N) x gravity (10) x height (m)

  2. In this extended essay, I will be investigating projectile motion via studying the movement ...

    This effectively indicates that the ejected metal ball had underwent a parabolic path despite the effects of air resistance. The projected metal ball had shown side way motion in some of the trials during the experiment although the fan and air conditioner are not in operation.

  1. Thermal Properties of Liquids

    Three trial runs for each liquid will ensure that I have sufficient data for an accurate and concise analysis. As I am investigating only one variable that can affect the heating rate of a liquid, I need to ensure

  2. HL Physics Revision Notes

    9.4: Orbital Motion: Gravitation provides the centripetal force for circular orbital motion. Derive Keplar?s 3rd law GMm/r2=mv2/r Gm/r2=v2/r (where v =2(pi)r/T) R3/T2 Derive expressions for the kinetic energy, potential energy and total energy of an orbiting satellite PE = -GMm/r KE = .5GMm/r Total energy = KE+PE = -.5Gm/r

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