Question

The lens which always give a diminished and virtual image is

• A. Convex lens
• B. Concave lens
• C. Plano convex lens
• D. Concave mirror

Answer 1

The Correct Option is B

To solve the problem, we need to identify which optical device always produces a diminished and virtual image regardless of the object position.

1. Understanding Image Formation by Lenses:
- A convex lens (converging lens) can form both real and virtual images depending on the object's position. It does not always produce a diminished image.
- A plano-convex lens behaves similarly to a convex lens and can produce magnified or diminished images.
- A concave mirror (converging mirror) can form real, inverted images and virtual, erect images depending on object placement.

2. Concave Lens Behavior:
A concave lens (diverging lens) always forms:
- A virtual image (cannot be projected on a screen)
- A diminished image (smaller than the object)
- An erect image (upright)
This behavior remains the same regardless of the object distance from the lens.

Final Answer:
The lens that always gives a diminished and virtual image is the $ \text{Concave lens} $