an object is kept at distance 25 CM in front of a concave mirror of radius of curvature 30cm find the position of the image
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object is placed at distance of 25 cm in front of concave mirror.
u = - 25 cm ( object is placed to the left of the mirror)
focal length of concave mirror, f= - 15 cm (focal length of concave mirror)
To find: position of image, v
By mirror formula,
1/u+1/v=1/f
1/-25+1/v=1/-15
1/v=1/25-1/15
1/v=-2/75
v=-75/2cm.
The negative sign indicates that the image is formed at the same side as that of object. The image distance is 75/2 cm.
Thus, it is formed beyond centre of curvature and the nature of image is real, inverted and magnified.
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