Concave Lenses

What is a concave lens?

• A concave lens converges light rays.

• A concave lens is thicker at the center than at the edges.

• A concave lens is used to correct farsightedness.

• A concave lens is a lens that is thinner at the center than at the edges.

How does light interact with a concave lens?

• Light rays passing through a concave lens diverge.

• Light rays passing through a concave lens are absorbed.

• Light rays passing through a concave lens converge.

• Light rays passing through a concave lens reflect.

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What type of image is formed by a concave lens?

• Virtual and enlarged

• Real and magnified

• Virtual and diminished

• Inverted and magnified

Explain the concept of focal point in a concave lens.

• The focal point in a concave lens is located outside the lens

• The focal point in a concave lens is where the light rays spread out

• The focal point in a concave lens is where diverging rays of light converge

• The focal point in a concave lens is the point where parallel rays of light converge after passing through the lens.

What happens to parallel rays of light when passing through a concave lens?

• They diverge or spread out

• They converge

• They pass straight through

• They reflect

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Describe the shape of a concave lens.

• Concave lenses are thicker at the center than at the edges.

• Concave lenses have a uniform thickness throughout.

• Concave lenses are flat.

• Concave lenses are thinner at the center than at the edges.

How does a concave lens diverge light rays?

• A concave lens has no effect on light rays.

• A concave lens diverges light rays due to its thinner center compared to the edges.

• A concave lens converges light rays due to its thicker center compared to the edges.

• A concave lens absorbs light rays instead of diverging them.

What is the focal length of a concave lens?

• Positive

• 10 cm

• Negative

• Zero

Explain the difference between a concave and convex lens.

• Concave lens diverges light, while convex lens converges light.

• Concave lens converges light, while convex lens diverges light.

• Concave lens bends light inward, while convex lens bends light outward.

• Concave lens focuses light, while convex lens scatters light.

How are concave lenses used in real-life applications?

• Concave lenses are used to focus light rays in telescopes.

• Concave lenses are used to filter colors in photography.

• Concave lenses are used to magnify images in microscopes.

• Concave lenses are used to diverge light rays in various optical devices.

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