• 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

# 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

# Related AS and A Level Microscopes & Lenses essays

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

4 star(s)

bright, especially since the experiment was conducted in a room with extraneous light sources, also, although I took measures (blu-tack,) to ensure the lens remained in constant position throughout, it is possible that it was not at a 90 degree angle to the ruler.

2. ## 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

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. ## Relationship Between U and V For a Convex Lens

results at higher object distances, resulting in a greater distribution of results at lower object distances. Until the object distance is below the focal point, when the image produced is virtual. The equation of the graph produced which is a prediction of the actual results, when plotting u over v is: 1 + 15 (v - 15)

1. ## The focal length of a convex lens.

The intercepts on the horizontal and vertical axes are the same. By taking the reciprocal of the intercept, the focal length can be determined. Another method of determining the focal length bases on the symmetric property of the two foci.

2. ## Find the focal length of a given convex lens.

Tabulate six sets of the values of d, L1, L2, l and l 2/d. 8. Plot a graph of l 2/d against d. 9. From the graph, find the y- intercept of the graph and calculate the focal length.

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

The final factor is the surface and colour of the screen. A shiny surface would confuse the observer with reflections, especially if it were not flat while a "bobbled" surface would cause the image to distort and therefore the point at which it focuses would be harder to determine.

2. ## Lenses experiment

Diagram 2 Unable to work out for I have no result for the size of the image. Ray Diagram 3 3.8=1.9 2.0 Ray Diagram 4 2.0=1.0 2.0 Ray Diagram 5 1.5=0.75 2.0 As you can see from my results the further the object was from the focal point the smaller the magnification got.

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