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Q: The light from a point source is rendered paralled by a concave mirror. What is the position of the light source?
  • A. Between focus and centre of curvature
  • B. At centre of curvature
  • C. At Focus
  • D. At infinity
Correct Answer: Option C - When a point source is held at focus of a concave mirror or a convex lens, we see the point source is rendered paralled by a concave mirror.
C. When a point source is held at focus of a concave mirror or a convex lens, we see the point source is rendered paralled by a concave mirror.

Explanations:

When a point source is held at focus of a concave mirror or a convex lens, we see the point source is rendered paralled by a concave mirror.