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AP EAMCET202420 May 2024Evening ShiftPhysicsRay OpticsActual

An object is placed at a distance of 18 cm in front of a mirror. If the image is formed at a distance of 4 cm on the other side, then focal length, nature of the mirror and nature of image are respectively

Options

  1. A3.14 cm , concave mirror and real image
  2. B3.14 cm , convex mirror and real image
  3. C5.14 cm , convex mirror and virtual image
  4. D5.14 cm , concave mirror and virtual image

Correct answer

C. 5.14 cm , convex mirror and virtual image

Step-by-step solution

For a spherical mirror, u =-18 ~cm , v =4 ~cm By mirror formula, 1 f = 1 v + 1 u = 1 4 + 1 -18 f= 36 7 ~cm =5.14 ~cm Also, f =+ ve . So, mirror is convex and virtual image is formed.

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