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# Focal Length Of A Concave Mirror

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Introduction

Focal Length Of A Concave Mirror Aim: To observe the focal length of a concave mirror. Materials: * Concave Mirror * Retort Stand * 2 Pins in stands * Candle * Matches * Ruler * Screen Procedure: 1. An approximate focal length was found using parallel light from a distant object. 2. The mirror was placed in a stand. Pin (A) was moved in its stand, in front of the mirror till there was no parallax between the pin and its inverted image. ...read more.

Middle

6. The image of a light source was located using a screen. Then the image and object distances were measured. 7. Step 6 was repeated twice. 8. The corresponding values of u and v were tabulated. Results: U V 0.50 m 2.00 m 0.55 m 1.40 m 0.60 m 1.25 m 0.65 m 1.00 m 0.70 m 0.95 m 0.75 m 0.57 m Data Analysis: * The tabulated results of step 8 illustrated the image distance, and the object distance . ...read more.

Conclusion

II. The average of the consistent results was then calculated. See Figure 1.2 Conclusion: The experiment enabled the physicist to locate the focal point of a concave mirror. Through the use of obtained results, the graph versus was formulated, proving that a linear relationship exists between the two variables. However the concave mirrors used in the experiment were too small in depth, which inhibited accurate measurements due to human error. Consequently the experiment was an overall success, the minor errors contained in the data did not affect the outcome of the experiment, which succeeded to locate the focal point of the mirror. Name: Gihan Mallawaarachchi Date: 19/02/02 ...read more.

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