Two convex lenses of focal length 10 cm each are combined. What will be the focal length of the combined lens ?

Explanation

To find the focal length of two combined convex lenses, we can use the formula for the combination of lenses in contact. The formula is given by:

\[ \frac{1}{f_{\text{net}}} = \frac{1}{f_1} + \frac{1}{f_2} \]

Where:
- \( f_{\text{net}} \) is the focal length of the combined lens,
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