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

Investigating the factors which Affect the image formed by a Convex lens

Extracts from this document...


INVESTIGATING THE FACTORS WHICH AFFECT THE IMAGE FORMED BY A CONVEX LENS APPARATUS Light box, screen, slide, stand, lens, power pack and metre rulers. METHOD 1. I set up the apparatus as shown in my prediction. 2. I then turned the light on putting it on 10v. 3. I then, by using a ruler, placed the lens 70cm away from the object. 4. I then moved the screen closer and further away from the lens in order to get a clear picture projected onto the screen. 5. When I had a clear picture, I measured the length between the lens and the screen. I recorded the result. 6. I will then move the lens 5cm closer to the light box and repeat steps 4 and 5. ...read more.


The image was inverted for al distances. For example, the image created with the lens 32cm away from the light box is clear when the screen is 110cm away from the lens. The image created with the lens 61cm away from the light box is made clear with the screen 42cm away form the lens. On my graph, as well as my actual results, I plotted the theoretical results using the formula: 1 + 1 = 1 U V F I had estimated the focus length of the lens I used was 20cm by projecting the light shone though a window through the lens and onto the screen. I then measured the distance between the screen and the lens. ...read more.


This shows that my evidence was reliable; as does the fact that I obtained no anomalous results. However, the procedure was not entirely accurate. It was very hard to get the light box lens and screen to line up perfectly and I do not know if this affected my results in any way. To improve the experiment, I would like to have done the measuring with more accuracy. In this experiment I only took measurements using centimetres to no decimal places. If I did it again I would take the measurements using millimetres. If I did the experiment again I would not only investigate one factor. I would also investigate the size of the image projected onto the screen when a clear picture has been obtained. I would also use more that one lens to see if a change in focus point would make that much of a change to the results. ...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 Microscopes & Lenses 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 Microscopes & Lenses essays

  1. To investigate the relationship between the distance between a lens and an object, and ...

    I will therefore use the same light source throughout to try and keep these factors as constant as possible. I will keep the light in the room as constant as I can by keeping all windows covered and blacked out.

  2. My experiments focus is to obtain an accurate measurement for a specific lenss power.

    Accuracy: All but one of the plotted points come into contact with the line of best fit. This indicates that my results are quite accurate. The U=325 result is not intercepted and so can be classed as an outlier. Reliability: The reliability of the first graph cannot be summarised well

  1. Lenses experiment

    focal length of lens/cm Average object distance/cm Description of image Average diameter of image/cm Average magnification 10.0 10.0 Indescribable Immeasurable / 10.0 12.0 Real, magnified & inverted 8.9 4.45 10.0 14.0 Real, magnified & inverted 4.5 2.25 10.0 16.0 Real, magnified & inverted 3.1 1.55 10.0 18.0 Real, magnified &

  2. To investigate the relationship between u and v for a convex lens.

    The range is wider but again is not big enough because the differences are hard to measure. For a focal length of 15 centimetres u v 20 70.5 100 29.4 The image is big enough to be easily measured and the image is clear.

  1. In this experiment I will be investigating the efficiency of a motor. I hope ...

    As the voltage and current remained constant the efficiency became higher with the more weights that were placed on to the string to be lifted. Due to fact that the motor had to do more work, the time increased resulting in a positive gradient through my graph.

  2. Investigating the Positioning of Real Images formed by a Convex Lens.

    To use the equation we need to know that : * If the lens is convex, f is then positive * If the lens is concave, f is taken as negative * When v is positive, the image is real * When v is negative, the image is virtual The

  1. Proving the lens formula.

    A 30 cm rule - Will be used to increase the accuracy of the measurements, where the metre rule proves difficult to use to get an accurate result. A Small screen - Flat white screen on a stand, used for the image to focus on.

  2. Relationship Between U and V For a Convex Lens

    When I increase the object distance (u), the image distance (v) decreases. This is shown on the table from 20.00cm of u to 200.00cm of u, where each time v decreases. However the image distance at 10.00cm meant v was recorded as negative.

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