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A concave mirror of radius of curvature 40cm is to be used to obtain a real image of an object. The image is to be one third as large as the object where should the object be placed and where is the image to be found ?

Sagot :

For a concave mirror, the object should be placed beyond the focal point to obtain a real and diminished image. In this case, the radius of curvature is 40 cm, so the focal length (f) is half of that, which is 20 cm. To achieve a real image one-third the size of the object, place the object approximately 30 cm beyond the mirror's focal point. The image will then be formed on the same side as the object, between the focal point and the mirror.