Long description: Fig37extra
Alt text: Two diagrams illustrate vector patterns: the left shows vectors pointing generally upward and to the right, and the right shows vertical vectors indicating increasing y-components.
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- Diagram (a) displays a grid of black arrows, which are vectors, oriented at an angle suggesting a consistent direction generally upward and to the right across the entire area.
- Diagram (b) displays a set of vertical arrows arranged in columns, suggesting a change in the y-component; the arrows are short in the upper row and progressively longer in the lower row, all pointing upward.