Question

Mark ‘T’ if the statement is true and ‘F’ if it is false: A concave lens always forms a real image. (T/F)

• A. True
• B. False

Answer 1

The correct option is B False

Concave Lens:

1. A lens where at least one of its two curved surfaces is concave in nature, or the surface is curved inwards is called a concave lens.
2. Due to this inward curve shape of the lens, it is thinner towards the center than its edges.
3. Therefore, when a light ray suffers refraction from a concave lens, it diverges the light ray.
4. Upon tracing back the diverged light ray we get the position of the virtual image formed.
5. Hence, the virtual image is generally formed on the side of the object.
6. It is used by patients with myopia or short-sightedness.

For an object present beyond the center of curvature,

For an object present at the center of curvature,

For an object present between the center of curvature and focus,

For an object present at focus,

Hence, the given statement is false.