Question

A concave mirror having the focal length 15 cm, forms an image having twice of the linear dimensions of the object. If the image is virtual, then the position of the object will be :

• A. 7.5 cm
• B. 22.5 cm
• C. 40 cm
• D. 30 cm

Answer 1

The correct option is A 7.5 cm

We know that virtual and erect image is formed when we place an object within focal length of the mirror. As focal length given = 15 cm. So, object distance must be less than 15 cm out of four given option only one option is correct.