Question

When an object is placed $15cm$ from a lens, a virtual image is formed. Mark the correct statements.

• A. The lens may be convex or concave
• B. If the lens is diverging, the image distance has to be less than $15cm$
• C. If the lens is converging, then its focal length has to be greater than $15cm$
• D. All of the above

Answer 1

The correct option is D All of the above

$u=-15$

$\frac{1}{v}-\frac{1}{u}=\frac{1}{f}$

$\frac{1}{v}+\frac{1}{15}=\frac{1}{f}$

$\frac{1}{v}=-\frac{1}{15}+\frac{1}{f}$

lens can be convex or concave
If the lens is diverging, the image distance has to be less than 15 cm
If the lens is converging, then its focal length has to be greater than 15 cm
All the options are correct
Hence option $D$ is correct