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

Investigation to find out what affects the size of a shadow.

Extracts from this document...

Introduction

Liam Haggerty 11Wd Investigation to find out what affects the size of a shadow. Aim To see what happens to the size of the shadow when certain factors are changed. Variables There are many variables in which I could change. For our experiment it will be sufficient for us only to change one variable the rest we will keep constant. Here is a list of variable from this I will choose on variable to which I think will have the mast effect on the size of the shadow. * Positioning of screen in co-ordination with the lamp * Size of the screen and the lamp * Size of the object used. * Shape of the object used * Angle of the screen * Shape of the screen * Distance between light and object. The variable highlighted in red is the one I will change, as this I believe is the factor that affects the size of a shadow the most. Hypothesis I predict that the closer the object is to the light source the larger the shadow will be. ...read more.

Middle

If we used a slightly different sized object are graph wouldn't be true. * I will measure our results very accurately in some cases three decimal places to ensure our results are very reliable. * The height of the lamp must remain the same throughout the experiment this is to ensure that we have no anomalies or unjustified results. If we follow all these guidelines our experiment should turn out reliable as well as successful. Plan * Attach boss to clamp stand. * Connect light source to power pack using connecting wires provided. * Securely fix the lamp to the boss at 50-cm (use a 100cm ruler to measure accurately). * Place down sheet of white a4 paper to act as screen again checking the height of the bulb. * Position object at 5cm intervals from the screen (e.g. 5cm, 10cm, 15cm etc) * Mark on the screen the size of the shadow accurately with a sharp pencil. * Tabulate results in an appropriate table making them clear and easy to understand. Results Experiment 1 Height from screen (cm) ...read more.

Conclusion

Evaluation After doing our experiment I can safely say that our results were sufficient enough to support a firm conclusion. This is due to the fact we repeated the experiment three times and all the results roughly matched up with each other. This was made possible because we carried our experiment out under fair guidelines and made sue everything was checked and recorded accurately. From looking at my graph it is safe to say that there weren't any anomalies as most of the points touch or are very close to my line of best fit. Although our results were sufficient enough I still believe that the experiment could of taken place under stricter guidelines and in more detail. If I did the experiment again I would make a few alterations to make our results even more reliable. Firstly I would change the light source to a ore secure and reliable one making sure the light had no chance falling or cutting off. This way we could concentrate on the object and the shadows more instead of adjusting the light. I would also make sure we had a device to hold the object in place. This would guarantee the objects were at the same angle and the correct distance from the screen. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Fields & Forces 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 AS and A Level Fields & Forces essays

  1. Peer reviewed

    paper cones investigation

    5 star(s)

    Evaluation Sources of error (in order of decreasing significance) Time to drop a fixed distance The measurement of time was the most significant uncertainty in this experiment (t = �16%). This random error was largely due to human variation in starting and stopping the stopwatch, on launch and landing.

  2. Objective To find the acceleration due to gravity by means of a simple ...

    Comment on the two methods. Ans: Computer/multimedia system can also be used in this experiment to measure the motion of a simple pendulum as it passes through a photogate timer. The computer can plot a graph of the results. The photogate emits a beam of infrared light from one side to which is received by a sensor to provide the timing signal.

  1. Maglev Trains And The Technology Behind Them (magnetism)

    As there is no friction the speeds the trains can reach is a lot higher, the fastest current conventional train is the Japanese bullet train which can travel at 300k.p.h, where as the Japanese Maglev train project has managed to make a train reach 550k.p.h although when in normal operation the trains will probably travel slower than this for stability.

  2. What Affects the Strength of Magnetism Exerted By an Electromagnet?

    Thus, a greater field is produced. It must also be inversely proportional to 'The Square of The Distance From The Charge'. This means that the field strength should get reduced as we move away from the charge. Fundamentally, a current produces a magnetic field due to the current consisting of many charges moving, each charge producing a magnetic field.

  1. Aurora- Light of Mystery.

    The temperature of the sun surface is about 5500�C and the temperature of the inner core is approximately 15000000�C, therefore all matter exists as plasma in the sun. In this state particles disintegrate into its constituent atoms and atoms may further decompose into proton and neutron.

  2. Electromagnet Investigation

    This means the electromagnet has become more efficient. My findings are backed up by Kim's results she found before 3A her results were doubling then after 3A the best fit line became steeper. The reasons for the curve could be that the electromagnet becomes more efficient.

  1. Electromagnets Investigation

    FAIR TEST: For this experiment to be fair, I need to consider a few things: * Keep the number of turns the same when I am doing the experiment for the current. * Keep the current the same when doing the experiment for the number of turns.

  2. Stopping distance Investigation.

    I will also conduct another investigation, where I increase the mass of the trolley each time, but by adding another trolley on top of it. The average trolley weighs about 815g, and so I will be increasing the mass of the trolley by roughly 815g each time, all the way up to 3 trolleys piled on top of each other.

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