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(7) When an object is kept at 6 cm in front of aconcave mirror, its image is obtained at 24 cmbehind the mirror. Find the focal length andradius of curvature of the mirror. |
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Answer» Given that:u=(-6)cmv=(+24)cm,Formula:1/f=1/u + 1/v1/f=1/(-6) + 1/241/f=-1/6 + 1/241/f=-24+6/144therefore,f=144/(-18)f=(-8)cmradius = 2×(-8)=-16cm |
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