What are concave and convex lens.
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Answer:
The lens which merges the light rays at a particular point, that travels through it, are a convex lens. The lens which disperses the light rays around, that hits the lenses, are called a concave lens. In the convex lens, the curve is outward facing, whereas, in the concave lens, the curve faces inward.
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✓A convex lens is thicker at the centre than at the edges. Convex lenses are thicker at the middle. Rays of light that pass through the lens are brought closer together (they converge). A convex lens is a converging lens.
✓A concave lens is a lens that possesses at least one surface that curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it.
A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).