CBSE Class 10 Science 2017 · Paper 31/1/1 · Question 16
An object cm in height, is placed at cm in front of a concave mirror of focal length cm. At what distance from the mirror should a screen be placed to obtain a sharp image of the object. Calculate the height of the image.
Answer
The screen is placed 30 cm in front of the mirror; the image is real, inverted and 8 cm tall.
The screen should be placed cm in front of the mirror, on the same side as the object ( cm). The height of the image is cm ( cm); the minus sign shows that the image is inverted. The image is real and magnified, twice the height of the object ().
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