👨 This video guides you through the drawing of the ripple tank interference pattern.

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👨 This video uses two applets to explain the interference pattern.

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🍏 You can play with the applets yourself.

https://ngsir.netfirms.com/englishhtm/Interference2.htm

Try clicking at different points to see what the path difference is, and the resulting interference.

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https://www.walter-fendt.de/html5/phen/interference_en.htm

🍏 Take note of how the crest-crest and trough-trough intersections move along the antinodal lines, and how the crest-trough and trough-crest intersections move along the nodal lines.

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• 10 Superposition