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What is the effect of increasing the curvature of a lens on its focal length?

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Question: What is the effect of increasing the curvature of a lens on its focal length?

Options:

  1. Focal length increases
  2. Focal length decreases
  3. Focal length remains the same
  4. Focal length becomes zero

Correct Answer: Focal length decreases

Solution: 

Increasing the curvature of a lens decreases its focal length.

What is the effect of increasing the curvature of a lens on its focal length?

Practice Questions

Q1
What is the effect of increasing the curvature of a lens on its focal length?
  1. Focal length increases
  2. Focal length decreases
  3. Focal length remains the same
  4. Focal length becomes zero

Questions & Step-by-Step Solutions

What is the effect of increasing the curvature of a lens on its focal length?
Correct Answer: Focal length decreases.
  • Step 1: Understand what a lens is. A lens is a transparent object that bends light.
  • Step 2: Know that lenses can be curved. Curvature refers to how much the lens is bent.
  • Step 3: Learn about focal length. Focal length is the distance from the lens to the point where light rays meet (focus).
  • Step 4: Realize that when the curvature of a lens increases, it means the lens is more curved.
  • Step 5: Understand that a more curved lens bends light rays more sharply.
  • Step 6: Know that when light is bent more sharply, it converges (comes together) at a point that is closer to the lens.
  • Step 7: Conclude that increasing the curvature of a lens decreases its focal length because the focus point moves closer.
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