Science
The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image?
- Infinity
- 30 cm
- Between 15 cm and 30 cm
- Between 0 cm and 15 cm
Reflection of Light
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Answer
Between 0 cm and 15 cm
Reason — Given, concave mirror as it is a converging mirror.
R = 30 cm
We know, R = 2f
Substituting we get, 30 = 2 x f
f = = 15 cm
In a concave mirror, virtual image is obtained when the object is placed between focus and optical centre hence, object should be placed between 0 cm and 15 cm.
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