A friend tells you that when she takes offher eyeglasses and holds them 23 cm above a printed page theimage of the print is erect but enlarged to 1.5 times its actual size. (a) Is the image real or virtual? How do you know? (b) What isthe focal length of your friend’s glasses? (c) Are the lenses in theglasses concave or convex? Explain

A friend tells you that when she takes offher eyeglasses and holds them 23 cm above a printed page theimage of the print is erect but enlarged to 1.5 times its actual size. (a) Is the image real or virtual? How do you know? (b) What isthe focal length of your friend’s glasses? (c) Are the lenses in theglasses concave or convex? Explain

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