Allied & ICAR Exam Bank • ALLIED_1975 MCQ • 2 Marks

Section 8: General Aptitude

Analytical & Spatial Aptitude

Subtopic: Spatial Reasoning & 3D Representations

Question Statement:

In a pinhole camera model, an object of height H is located at distance D from the pinhole. If the distance from the pinhole to the image sensor is focal length f, what is the image height h'?

Options:

  • (A) h' = H * (f / D)
  • (B) h' = H * (D / f)
  • (C) h' = f * D / H
  • (D) h' = H * f * D

Answer Key:

A

Step-by-Step Solution & Explanation

By similar triangles in central projection: h' / H = f / D, giving h' = H * (f / D).
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