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Sun subtends an angle of 0.5 ° at the centre of curvature of a concave mirror of radius of curvature 15 m . The diameter of the image of the sun formed by the mirror is

Options

  1. A8 . 55   cm
  2. B7 . 55   cm
  3. C6 . 55   cm
  4. D5 . 55   cm

Correct answer

C. 6 . 55   cm

Step-by-step solution

θ = 1 2 × π 180 rad d i a m e t a r o f i m a g e f o c a l l e n g t h = θ Or diameter of image = 1 2 × π 180 × 15 2 × 100 c m = 6.55 c m

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