What is a concave lens?
Understand the Problem
The question is asking for the definition of a concave lens. This involves understanding its shape and how it affects light.
Answer
A concave lens is a diverging lens, curving inwards and spreading light rays to form diminished, upright, virtual images.
A concave lens is a lens that has at least one surface that curves inwards. It is thinner in the middle and thicker at the edges, causing light rays to diverge or spread out. They form diminished, upright, virtual images and are used in applications like telescopes and correcting nearsightedness.
Answer for screen readers
A concave lens is a lens that has at least one surface that curves inwards. It is thinner in the middle and thicker at the edges, causing light rays to diverge or spread out. They form diminished, upright, virtual images and are used in applications like telescopes and correcting nearsightedness.
More Information
Concave lenses are also known as diverging lenses because they cause parallel light rays to spread out or diverge. The image formed by a concave lens is always virtual (meaning the light rays do not actually converge at the image point), upright, and smaller than the object.
Tips
A common mistake is confusing concave and convex lenses. Concave lenses curve inward, while convex lenses curve outward.
Sources
- What is a Concave Lens? - Shanghai Optics - shanghai-optics.com
- Concave Lens | Definition, Uses & Examples - Lesson - Study.com - study.com
- Concave Lens - Universe Today - universetoday.com
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