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When parallel railway tracks appear to converge in the distance, which monocular depth cue is at work?
AConvergence of the eye muscles acting on the parallel tracks
BAerial perspective acting on parallel converging lines
CRetinal disparity acting on parallel converging lines
DLinear perspective acting on parallel converging lines
Answer & Solution
Correct answer: D. Linear perspective acting on parallel converging lines
1. The chapter lists several monocular pictorial cues used to perceive depth.
2. It defines linear perspective as the phenomenon where parallel lines appear to converge with distance.
3. Rail tracks meeting at a vanishing point are given as the canonical example of this cue.
4. Retinal disparity and eye convergence are binocular not monocular cues.
5. Aerial perspective involves haze on distant objects, not converging parallel lines.
6. Hence the converging-tracks effect is linear perspective.
_Source: NCERT Class 11 Psychology Ch 4 "Sensory, Attentional and Perceptual Processes", p. 71, Monocular Cues_
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