Question on: WAEC Physics - 2018

The question asks to identify the type of lens illustrated. Without an image, it's impossible to identify the exact lens. However, based on the options, let's consider the possibilities:

• Converging meniscus: A lens that is thicker at the center than at the edges and converges light rays.
• Plano-convex: A lens with one flat surface and one convex (outwardly curved) surface.
• Diverging meniscus: A lens that is thinner at the center than at the edges and diverges light rays.
• Bi-convex: A lens with both surfaces convex (curved outwards).

Without the image, the best logical deduction is to consider the common lens shapes. If the lens appears to curve inwards, it is a diverging meniscus. If it curves outwards, it can be converging or bi-convex, depending on the other surface. If one side is flat and the other curved outwards it is plano-convex.

Therefore, a definitive answer is not possible without an image. However, given the options, the response that describes the lens shape correctly would be one of the converging or diverging meniscus or bi-convex or plano-convex depending on the shape.