• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5

# 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

# Related AS and A Level Fields & Forces essays

1. ## Investigating the forces acting on a trolley on a ramp

5 star(s)

0.14% (2d.p.), giving the value of 10.836� a percentage error that is 5 times smaller than that of the same measurement using the digital spirit level. There was almost certainly other systematic and random errors in the experiment, however, once considered, these were largely reasoned to be counted as negligible.

2. ## paper cones investigation

5 star(s)

Each cone was dropped from a height of 2.00 m and its descent time measured using a stopwatch. m / kg t1 / s t2 / s t3 / s Mean t / s Range in t / s 0.005 2.20 1.88 1.64 1.90 0.56 0.010 1.41 1.55 1.48 1.48

1. ## Stopping distance Investigation.

The equations are as follows: DISTANCE = SPEED X TIME SPEED = DISTANCE / TIME TIME = DISTANCE / SPEED RANGE AND REPEATS: When I conduct the first experiment, I will measure the stopping distance of the vehicle when the trolley has no extra weight added to it.

2. ## What are the kinematic factors of performance in sprint starting?

Detail where in the cycle both sprinters are losing speed. Explain why? The novice sprinter loses speed between the initial RTO event and the LTO event. This may be due to less power being generated from the initial push off the blocks in the crouch position compared to that produced by the trained elite sprinter.

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

The polarity of the eddy current is same as the polarity of the Superconducting magnets onboard the vehicle. Repulsion results, "pushing" the vehicle away and thus up from the track. The gap between vehicle and guideway in the EDS-system is considerably wider than the EMS at 1 to 7 inches.

2. ## Building a hovercraft with household objects.

Pull the string tight and use this string to guide your marker in drawing a perfect circle. This will be much like using a compass (be careful not to tilt the marker, this will throw off your circle). 4. Use a saber saw to cut the out the circle you have drawn.

1. ## Elastictvy of Copper investigation

In this experiment I will be measuring the Tension/extension instead of Compression. Stress is a measure of the force per unit area within a body. This does not take into account the change in cross-sectional area as the material deforms.

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

This procedure results in attraction. However, the domains can be arranged using different methods. Bashing one of the metals with a hammer will distort the direction of the domains. There will become an uneven ratio of domains pointing in one specific direction.

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