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

To Determine the Focal Length of a Convex Lens.

Extracts from this document...

Introduction

To Determine the Focal Length of a Convex Lens. Aim: To determine the relationship between the power of the vocal lens, object and the image distance from the lens. Apparatus: Bulb Projector Convex lens Lens holder Screen Optical Bench 12V power supply Diagram: Method: * Set up the apparatus as shown in diagram. * Put the focal lens at the first distance shown on the results. Also put the object at the 0 point of the optical bench. * Switch the 12V bulb and move the projector until a clear picture of the object is visible. * Record the results on the results table of the distance from the lens to the projector * Keep on moving the object to the 6 points shown on ...read more.

Middle

as well as measuring the distance from the lens to the projector (V) will make me think of a formula. I have obtained a formula for this: - 1 + 1 = 1 or 1 = -1 + P U V F U V AND Problems that might arise: In this experaments there might be a number of problems. For example the equipment might not be 100% accurate; this might effect my results, so I will do the experiment two or three times to ensure the results are accurate. I will keep the bulb brightness the same all through out the experiment. I will also keep the projector in the same place, which is at zero on the optical bench. ...read more.

Conclusion

I can see this from my results and I also saw that the closer the lens to the object the smaller the object on the screen. I also have found out that if the object is to close to the lens the object can not be focused on to the screen, this is called virtual imaging (see below diagram). I have not got any trends or odd results and I think that the experiment went as I had planed, except the results table I done was not going up in 5mm but was going up in 10mm which made the results not as accurate. There were no other problems. I think that the experiment could not have gone any better then I planed. Asif Ishaq ...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. Peer reviewed

    Physics coursework; Finding the focal length of a lens using a graphical method.

    4 star(s)

    the 1metre ruler is only correct to the nearest mm meaning that is as precise as I can make my measurements, and the marks defining mm's on the ruler are quite thick in comparison to the spaces in between them, in the same way, the measurements of v are based

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

    Hypothesis: The larger the distance between the lens and the object, the smaller the distance between the lens and a projected, focused and real image onto a screen. This is because, as shown in my measured ray diagrams (entitled "Prediction"), the focal point is shown to be farther away when the object is closer.

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

    sure it is secure * Set the lens stand in front of the ray box * Setup the screen in front of the lens stand * Calculate the focal length of the lens, by using parallel light from a window * Blue - Tack the lens into the lens stand

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

    The range is wide, easy to deal with and easy to measure the difference. Conclusion I conclude with the evidence collected in the preliminary investigations and with the evidence shown in my ideal results that the best lens to use for this experiment will be the lens with a focal lens of 15 centimetres.

  1. Does the focal length of a lens depend on the colour of light used?

    always had a smaller average focal point for each respective object distance compared to the red light. For example when U was 22cm the average focal point for blue light was 152.8cm and for red light the focal point was 158.5cm.

  2. Finding the Focal Length of a Lens.

    This image can be projected but cannot be focused onto the screen (this image is known as a virtual image). * However, this effect became useful, because we used another lens to magnify the image on the screen to see whether or not the image (dots)

  1. Lenses experiment

    Preliminary work Apparatus In the preliminary work I have to find out which lens I will be using and why I have chosen to use that particular one. I will want the one with the most easily manageable focal distance.

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

    Accuracy: Looking at the mean gradient line, the majority of plots are intercepted suggesting the results are accurate. However the U=300 and U=450 results do not come into contact with the line, and several others intercepted at the minimum/maximum limits.

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