convex lens

Thân thiện

A convex lens focuses sunlight onto a piece of paper.

Definition

1. Noun:
   • A lens that is thicker at its center than at its edges, causing parallel rays of light passing through it to converge or meet at a single point (focus). It is also known as a converging lens.

Usage

• Noun:
  • A convex lens is a fundamental component in devices like magnifying glasses, cameras, and eyeglasses for farsightedness.
  • The property of a convex lens to bend light inward is used to create enlarged images.

Examples

• Noun:
  • A simple magnifying glass uses a convex lens.
  • The optician prescribed glasses with a convex lens to correct her hyperopia.
  • In the experiment, sunlight passing through the convex lens focused onto a piece of paper, causing it to burn.

Advanced Usage

• "To act as a convex lens": Used metaphorically to describe something that concentrates attention, energy, or information onto a central point.
  • The summit acted as a convex lens, focusing global media attention on the climate crisis.

Variants and Related Words

• Converging lens: A direct synonym for a convex lens.
• Positive lens: Another technical term used in optics, emphasizing its positive focal length.
• Biconvex lens: A specific type of convex lens where both surfaces curve outward.
• Plano-convex lens: A lens with one flat surface and one convex surface.

Synonyms

• Converging lens
• Positive lens

Related Phrases

• Focal point of a convex lens: The specific point where parallel rays of light converge after passing through the lens.
• Power of a convex lens: A measure of its converging ability, expressed in diopters.

Học thuật

Noun

1. lens such that a beam of light passing through it is brought to a point or focus

Từ đồng nghĩa

• converging lens