The concave lens produces a virtual, erect diminished image.
Using Real Is Positive RIP Convention, u=30 and f=-15
1/u + 1/v = 1/f
1/30 + 1/v= −1/15
1/v = −1/15 − 1/30 = −3/30 =−1/10
Therefore, the image formed by the lens is
- 1/3 size of the object
- 10 cm between lens and object
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