SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A concave mirror produces a magnification of +4. The object is placed:
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At the focus
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Between focus and centre of curvature
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Between focus and pole
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Beyond the centre of curvature
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Explanation:
Detailed explanation-1: -A concave mirror forms different images depending on the position of the object. When an object is placed only between the pole and the focus of the mirror, a magnified image is produced. Therefore, a magnification of +4 is produced when the object is placed between the pole and the focus of the mirror.
Detailed explanation-2: -Hence when an object is places between focus and the pole of a concave mirror, then image formed is virtual, erect and magnified image .
Detailed explanation-3: -A concave mirror forms a real image four times as tall as the object placed 10 cm in front of mirror. Find the position of the image and the radius of curvature of the mirror. (Ans. 40 cm in front of the mirror, R=-16 cm)
There is 1 question to complete.