Teaching Bihar STET Paper 1 (माध्यमिक) Mock Test 2024 Physics Optics Refraction and Reflection

A concave lens has a focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens?

1

30 cm

2

40 cm

3

15 cm

4

60 cm

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