Watch from to 4:29 to 5:17 for the double ripple interference pattern
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This is what the water waves in a ripple tank looks like.
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👨 This video helps you to understand the formation of the interference pattern.
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👨 This video shows you how to draw the ripple tank interference pattern manually.
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You can play with the applets yourself.
🍏 https://ngsir.netfirms.com/englishhtm/Interference.htm
🍏 https://ngsir.netfirms.com/englishhtm/Interference2.htm
🍏 https://www.walter-fendt.de/html5/phen/interference_en.htm
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