An object is kept at a distance of 40 cm from a diverging lens of a focal length 20cm. At what distance the image is formed from the lens? Find the magnification of the image.
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Since focal length of concave mirror given is 20cm l. Object is at 40cm distance which means it is at centre of curvature. hence, image will be formed of same size and at centre focus only but real and inverted.
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see the answer calculate the nature of the image and size of the image
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