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A concave mirror is used for rear-view on an automobile has a radius of curvature of 3.00m. If a bus is located at 5.00m from this mirror, find the position, nature and size of the image. |
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Answer» Explanation: Radius of CURVATURE of the convex mirror R = 3 m Focal length of the convex mirror f = R/2 = 1.5 m (positive for convex mirror) Object (bus) DISTANCE u = − 5 m IMAGE distance v = ? Mirror formula is: 1/f = 1/v + 1/u 1/1.5 = 1/v + 1/(−5) 1/v = 1/1.5 + 1/5 = (5 + 1.5)/(5 x 1.5) = 6.5/7.5 v = 7.5/6.5 = 1.15 m Position of the image is at 1.15 m behind the mirror |
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