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Q: The lens which is thin in the middle and thick at its periphery is called as ?
  • A. Concave lens
  • B. Parallel lens
  • C. Convex lens
  • D. Cylindrical lens
Correct Answer: Option A - A lens which is thinner at the middle and thicker at the edges is called a concave lens. It is a type diverging lens. The concave lens is used in cameras, in flashlights, in telescopes etc.
A. A lens which is thinner at the middle and thicker at the edges is called a concave lens. It is a type diverging lens. The concave lens is used in cameras, in flashlights, in telescopes etc.

Explanations:

A lens which is thinner at the middle and thicker at the edges is called a concave lens. It is a type diverging lens. The concave lens is used in cameras, in flashlights, in telescopes etc.