A concave lens is a transparent optical device with curved surfaces that diverges light rays. It causes parallel light rays to spread out and is commonly used in correcting nearsightedness in eyeglasses.
An object is placed at a distance of 60 cm from a concave lens of focal length 30 cm. a) Use lens formula to find the distance of image from the lens. b) Draw a ray diagram to justify your answer in part (a).
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