Question

If an object is placed at centre of curvature of a convex lens, the image height is $5cm$. What will be the height of the image if the same object is placed between centre of curvature and focus of the convex lens?

• A. Less than $5cm$
• B. Equal to $5cm$
• C. Greater than $5cm$
• D. Infinitely large

Answer 1

The correct option is C Greater than $5cm$

If object is kept at centre of curvature, image height will be equal to object height. So, the object height is $5cm$.


When the same object is kept between centre of curvature and focus of lens, the image height will be greater than that of object height as shown. Hence, the image height will be greater than $5cm$.