Question

An object is placed at a distance of 10 cm from a concave mirror of focal length 15 cm. What is the image distance?

• A. \( 30 \, \text{cm} \)
• B. \( 20 \, \text{cm} \)
• C. \( 50 \, \text{cm} \)
• D. \( 60 \, \text{cm} \)

Hint:

Remember: For a concave mirror, the focal length is negative and the image distance can be positive or negative depending on the nature of the image.