A concave lens is a diverging lens, meaning it causes light rays to bend away from its axis. When an object is placed in front of a concave lens, the image formed can be either real or virtual, depending on the object’s position relative to the lens.
Given that the focal length of the concave lens is 10 cm, we can use the lens formula to find the object distance. The lens formula is:
Where:
Solving for (u):
[ \frac{1}{10} = \frac{1}{-10} - \frac{1}{u} ]
[ \frac{1}{u} = \frac{1}{10} + \frac{1}{10} = \frac{2}{10} = \frac{1}{5} ]
[ u = -5 , \text{cm} ]
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