I can help you with that. Here’s a breakdown of the steps involved in finding the refractive indices of water and transparent oil using a plane mirror, an equiconvex lens of known refractive index, and an adjustable object: Apparatus: * Plane mirror * Equiconvex lens of known refractive index * Adjustable object (needle or pin) * Optical bench * Water * Transparent oil * Container to hold the liquids Theory: The refractive index of a medium is the ratio of the speed of light in vacuum to the speed of light in the medium. It is denoted by the symbol n. The refractive index of a liquid can be determined using the following formula: n = (u + 1) / (u – 1) where u is the ratio of the focal length of the lens in air to the focal length of the lens in the liquid. Procedure: * Set up the apparatus: * Place the plane mirror on the optical bench. * Place the equiconvex lens in front of the mirror. * Place the adjustable object in front of the lens. * Adjust the position of the object until a sharp image is formed on the object itself. This is the position of the object for which the image is formed at infinity. * Measure the distance between the object and the lens. This is the focal length of the lens in air, f_a. * Find the focal length of the lens in water: * Place the container filled with water between the lens and the mirror. * Adjust the position of the object until a sharp image is formed on the object itself. * Measure the distance between the object and the lens. This is the focal length of the lens in water, f_w. * Calculate the refractive index of water: * Calculate the ratio u = f_a / f_w. * Substitute the value of u in the formula n = (u + 1) / (u – 1) to find the refractive index of water. * Repeat steps 2 and 3 for transparent oil. Calculations: * Refractive index of water: n_water = (u_water + 1) / (u_water – 1) * Refractive index of oil: n_oil = (u_oil + 1) / (u_oil – 1) Precautions: * Make sure that the surfaces of the lens and mirror are clean. * Ensure that the object is
To find the refractive indices of water and transparent oil using a plane mirror an equiconvex lens of known refractive index and adjustable object needle
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