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Physics Full Laboratory Report (3) Title: The focal length of a convex lens. Aim: *To learn the technique of locating real image by no-parallax method. *To study the real image formed by a convex lens. *To determine the focal length of a convex lens by graphical method. *To determine the focal length of a convex lens by conjugate foci method. Apparatus: 1 convex lens on a holder (with focal length not greater than 15 cm) 1 1-meter ruler, 1 translucent screen, 1 plane mirror, 1 optical pin on a cork, 1 illuminated object (a lamp house with a letter 'F' on it) For further investigation: 1 more convex lens of the same focal length as above. Principles: A convex lens (converging lens) is a circular glass plate convex on both surfaces. The non-uniform thickness causes bending of light towards the principle axis. In particular, a convex lens converges light from infinity parallel to the principal axis to a point, called the focus...

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