Concave Lens (Noun)
Meaning
A lens such that a parallel beam of light passing through it is caused to diverge or spread out.
Classification
Nouns denoting man-made objects.
Examples
- The ophthalmologist prescribed a pair of glasses with a concave lens to correct the patient's nearsightedness.
- A concave lens is thinner in the middle than at the edges, causing light rays to diverge and resulting in a virtual image.
- In a simple magnifying glass, a convex lens is used, but in corrective eyeglasses for nearsightedness, a concave lens is typically used instead.
- When light passes through a concave lens, it spreads out and does not converge, resulting in a virtual image that appears smaller and upright.
- The optician carefully ground the concave lens to the exact specifications required to correct the patient's astigmatism and myopia.