Question

A convex lens has a focal length of \( 20 \, \text{cm} \). An object is placed at a distance of \( 30 \, \text{cm} \) from the lens. What is the position of the image formed?

• A. \( 60 \, \text{cm} \)
• B. \( 15 \, \text{cm} \)
• C. \( 10 \, \text{cm} \)
• D. \( 25 \, \text{cm} \)

Hint:

To find the position of the image in lens problems, use the lens formula \( \frac{1}{f} = \frac{1}{v} - \frac{1}{u} \) and solve for the image distance \( v \).