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An object is placed at infinity in front of aconcave mirror of radius off curvature 40cm. The image will be formed in front of themirror a distance of:0 20 cm0 30 cm040cmO 50 cm |
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Answer» Answer: 20 cm Explanation: Since the OBJECT is at INFINITY the image is FORMED at the focus . we can confirm that by the mirror formula 1/f = 1/u +1/v here u= infinity f=R/2 =40/2 = 20 1/20 = 1/infinity +1/v since 1/infinity is ZERO 1/20 = 1/V v= 20 cm
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