Question

A convex lens of focal length 8 cm forms a real image of the same size as the object. The distance between object and its image will be:

विकल्प

• 8 cm

• 16 cm

• 24 cm

• 32 cm

Answer 1

32 cm

Explanation:

A convex lens forms a real image at 2f on the right side of the lens. The size of the image is equal to that of the object if the object is placed at 2f.

∴ Distance between the image and the object = 2f + 2f

= 4f

= 4 × 8

= 32 cm