Answer: The correct answer is Image 2.
Step-by-step explanation:
Concave lens is defined as the lens which diverges the light falling on it. It is considered as a diverging lens.
Convex lens is defined as the lens which converges the light falling on it. It is considered as a converging lens.
Types of concave lens:
- Plano-concave lens: In this one side of the lens is plane and one side is concave.
- Double concave lens: In this, both the sides of the lens is concave.
- Convexo-concave lens: In this, the convex face of the lens has greater degree of curvature than the concave face.
Types of convex lens:
- Plano-convex lens: In this one side of the lens is plane and one side is convex.
- Double convex lens: In this, both the sides of the lens is convex.
- Concavo-convex lens: In this, the convex face of the lens has smaller degree of curvature than the concave face.
So, image 1 is a double convex lens, image 2 is a plano-concave lens, image 3 is a plano-convex lens and image 4 is a concavo-convex lens.
Hence, the correct answer is Image 2.