# determining the focal length of a convex mirror experiment

To turn on the wire gauze, click on the ‘Light On’ button. You can verify you result by clicking on the ‘Show result’ button. The principal focus is in front of the concave mirror and is behind the convex mirror. Following are the ways to obtain the focal length of convex lens: The convex lens is thicker in the middle and thinner at the edges and is also known as the converging lens. Adjust the position of the mirror using the slider to get a clear image of the wire gauze on the screen placed side by side with the wire gauze. Divide corrected PI by 2 and write in column 4. Measure the distance between mirror and screen (rough focal length). Move object needle upright towards mirror in steps of 1 cm to get observation .Repeat the experiment . CBSE Class 10 Science Lab Manual – Focal Length of Concave Mirror and Convex Lens. Find mean of values of f‘recorded in column 4. Thus, the focal length of a concave mirror can be estimated by obtaining a real image of a distant object at its focus. Observation table Calculations 1. मराठी. A convex mirror always forms virtual image of a real object and hence the value of v (i.e. Focal Length of Convex LensB11 Lab Report Objectives of the experiment: To determine the focal length of a spherical convex lens ♦ by “Lens formula method” ♦ by “Lens replacement method”. To insert the convex lens in front of the wire gauze, click on the ‘Insert convex lens’ button. Adjust the position of the screen using the slider. Diagram. Repeat the experiment by moving the convex lens towards the object by 2 cm each time and record the values in a tabular column. Record your observation . മലയാളം Now place another side by side with the wire gauze. Measure the distance between the mirror and first screen and take as the radius of curvature of the mirror R. The focal length of the mirror is calculated as, Repeat the experiment by moving the convex lens towards the object by 2 cm each time and record the values in a tabular column. Select the position of the convex lens using the slider. Attach the holders to the bench. As the distance between the pole 0 of the concave mirror and the focus F is the focal length of the concave mirror. To compare both methods. You can calculate the focal length of the mirror using the equation f = R/2. Place a convex lens on a stand facing the illuminated wire gauze at a fixed distance, say 30 cm, away from the wire gauze. Focal length = Radius of curvature/2. As performed in the simulator. A concave mirror, like a plane mirror, obeys the laws of reflection of light. Focal length of the convex mirror, Mean (f) = ------cm, The focal length of the given convex mirror = ……………….cm, Developed by Amrita Vishwa Vidyapeetham & CDAC Mumbai. Simulator Procedure (as performed through the Online Labs): Result Attach the single-pronged candle holder to a carrier at one end of the optical bench. Now click on ‘Insert convex mirror’ button to insert the convex mirror in between the wire gauze and the screen. To find the focal length of a convex mirror, using a convex lens.Class-XII Subject-Physics Practical (Experiment-8) (Class-8) | Focal length of a convex mirrorThere is a series of videos on related topics.Do Share \u0026 Subscribe our Channel for such exciting Educational videos.Visit our Official Facebook page for more information regarding Vivekananda Academy(CBSE), Serampore-https://www.facebook.com/vivekanandaacademyserampore/#CBSE #NCERT #SCHOOL #CBSESCHOOL #Practical #Project #CbsePractical #CbseProject See diagram: To start you would need to focus an image with a long focus lens or concave mirror onto a screen. Theory: In this experiment, we have chosen two methods to find out the focal length of a spherical lens. Result . F =uv /u-v f from u-v graph. Experiment: Find the focal length of a convex mirror using a convex lens. This brief experiment shows how to determine the focal length of a convex lens using the parallax effect. is the distance between the pole P and the principal focus F of a curved mirror. Attach a convexlens to one lens/mirror holder and the plane mirror to the second holder. Write observed PI in column 3a and corrected PI in column 3b. Focal Length of Convex Mirror Experiment. The refracted rays from the parallel beam of light converge on the other side of the convex lens. An image can be obtained with the help of a convex lens side by side with the object when the convex mirror reflects the rays along the same path, i.e., when the rays fall normally on the mirror. Table for focal length of convex mirror. Focal length of convex lens. Measure the distance between the mirror and first screen and take as the radius of curvature of the mirror R. The focal length of the mirror is calculated as .