• 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...

Introduction

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.

Middle

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.

Conclusion

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

    The highest efficiency reached in my results was when picking up the top weight of 1N, which my calculations showed to have the efficiency of 14.04%, this means that 86.06% was wasted energy; this was probably due to the friction of moving parts in the motor resulting in heat and sound released into the environment.

  2. Relationship Between U and V For a Convex Lens

    We shall then find out which lens to use by producing images on the screen at different u distances, and testing which lens will produce clearer distances. This will be done by setting up the apparatus, by placing a cross wire window in front of the lamp, then placing the different lenses on the lens holder.

  1. The focal length of a convex lens.

    A graph of d� - a� against d was plotted. The best-fit straight line was drawn and the slope of the graph was measured. Using equation (2), the focal length of the convex lens was determined. Results: Experiment 1: Focal length of the convex lens found was 10cm.

  2. Lenses experiment

    28.0 Real diminished & inverted 1.1 0.55 10.0 28.0 Real diminished & inverted 1.0 0.50 10.0 30.0 Real diminished & inverted 0.8 0.40 10.0 30.0 Real diminished & inverted 0.9 0.45 10.0 30.0 Real diminished & inverted 0.9 0.45 10.0 30.0 Real diminished & inverted 0.8 0.40 Average Results Average

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

    I need to know this information so that I can construct ray diagrams and also ensure that the object and screen are kept beyond the focal point during the experiment, to produce a real image. Variables: The following factors could affect a convex lens: * Material of lens used.

  2. Given a Tube Containing a Lens, Calculate The Focal Length of The Lens and ...

    0.105 �0.022 0.95 0.127 0.179 0.153 �0.026 1.50 *0.187 0.239 0.213 �0.026 2.00 0.231 0.304 0.268 �0.033 2.45 0.286 0.344 0.315 �0.029 3.15 0.357 0.434 0.396 �0.039 3.50 0.391 0.477 0.436 �0.042 From this information and from the graph, this gives: f = gradient = dy / dx = 0.275

  1. Finding the Focal Length of a Lens.

    were in focus. (See third bullet point) After doing the pre-test, the problems encountered can be rectified in the experiment proper. Now all that is left is to make some measurements of u and v when the image on the screen is focused, put them into the lens equation and see whether or not the focal length is 20 cm.

  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

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