Difficulty: Easy
Correct Answer: Correct
Explanation:
Introduction / Context:
Understanding projection types is essential for selecting the right view method. Isometric is a parallel projection; perspective is a central projection with convergence. This question asks you to confirm the fundamental difference.
Given Data / Assumptions:
Concept / Approach:
Parallel projection eliminates convergence effects; it preserves parallelism to aid measurement-like interpretation. Perspective mimics human vision: parallel edges not parallel to the picture plane appear to meet at finite vanishing points on or off the horizon.
Step-by-Step Solution:
Identify projection type: parallel (isometric) vs. central (perspective).Check for vanishing points: none in isometric; one, two, or three in perspective.Confirm that the statement captures this essential difference.
Verification / Alternative check:
Visualize a cube: in isometric, top edges remain parallel; in perspective, edges recede to vanishing points, altering apparent size with distance.
Why Other Options Are Wrong:
Restrictions to aerial views, infinite focal length, or specific numbers of vanishing points distract from the general principle.
Common Pitfalls:
Assuming orthographic views equal isometric; forgetting that three-point perspective converges verticals too.
Final Answer:
Correct
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