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CBSE Class 10 Answered

An object 4 cm in height is placed at 15 cm in front of a concave mirror of focal length 10 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.
Asked by ABHILASHA | 13 May, 2018, 08:01: AM
answered-by-expert Expert Answer
The formula related to focal length f, object-to-mirror distance u and image-to-mirror distance v is given by
solving for v, we get v = 30 cm.
 
magnification = -v/u = -30/15 = -2;
 
image size = -2×4 = -8 cm (negative sign indicates image is inverted)
Answered by Thiyagarajan K | 13 May, 2018, 03:49: PM
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