What is the distance between the object and the image if the object is placed at a distance of 40 cm from a concave mirror of focal length 20 cm? 20 cm 40 cm 80 cm 0 cm
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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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