Two positive thin lenses have a focal length of 40 cm and 60 cm respectively and both lenses are 20 cm apart. Where an object should be placed so that its image is 45 cm behind the second lens. Determine the location of the main points.
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Two positive thin lenses have a focal length of 40 cm and 60 cm respectively and both lenses are 20 cm apart. Where an object should be placed so that its image is 45 cm behind the second lens. Determine the location of the main points.
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