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demonstrations:6_optics:6d_interference:interference_fringes_in_a_soap_bubble:start
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demonstrations:6_optics:6d_interference:interference_fringes_in_a_soap_bubble:start [2019/02/14 22:13] demoroom |
demonstrations:6_optics:6d_interference:interference_fringes_in_a_soap_bubble:start [2020/03/16 17:20] demoroom |
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| ====== Interference Fringes In A Soap Bubble ====== | ====== Interference Fringes In A Soap Bubble ====== | ||
| - | {{tag>bubbles needs_review untagged unlocated}} | + | {{tag>bubbles interference waves light surface_tension located}} |
| <WRAP box right> | <WRAP box right> | ||
| - | {{InterferenceFringesInASoapBubble_006.jpg?400|}} | + | {{img_20190212_155058.jpg?400|}} |
| - | // // | + | // Example of the interference patterns visible using solution no.2 // |
| </WRAP> | </WRAP> | ||
| Line 22: | Line 22: | ||
| ===== Apparatus ===== | ===== Apparatus ===== | ||
| - | In box labeled 'Thin Film Interference': | + | In box labeled 'Thin Film Soap Bubble': |
| * 10cm diameter ring | * 10cm diameter ring | ||
| * lens | * lens | ||
| + | * clamp for ring | ||
| * solution | * solution | ||
| + | * Yellow filter | ||
| Additionally: | Additionally: | ||
| - | * [[equipment:35mm_projector|35 mm projector]] | + | * [[equipment:35mm_projector:start|35 mm projector]] |
| - | * various stands and clamps | + | * A pair of [[equipment:lab_stands:start|lab stands]] |
| ===== Setup ===== | ===== Setup ===== | ||
| Line 38: | Line 39: | ||
| A solution is made out of dish soap, water, and glycerin (to help prolong the life of the bubble). The metal ring is dipped into the solution (a pie plate works well to hold it) and placed into the test stand. The projector is aimed at the bubble film and the reflection is focused onto a distant screen using the lens. | A solution is made out of dish soap, water, and glycerin (to help prolong the life of the bubble). The metal ring is dipped into the solution (a pie plate works well to hold it) and placed into the test stand. The projector is aimed at the bubble film and the reflection is focused onto a distant screen using the lens. | ||
| + | |||
| + | Optionally, you can put the yellow filter in the projector. Then instead of seeing a multicolored interference pattern, a yellow and black pattern will be visible. This may be easier to explain than the multicolored pattern, though it'll be less pretty. | ||
| ===== Bubble Solution Recipes ===== | ===== Bubble Solution Recipes ===== | ||
| Line 66: | Line 69: | ||
| Students must be reminded that the lens has inverted the image. Depending on the solution you use, the thinnest portion of the film will therefore be seen at the bottom on the screen as an extended black area just before the bubble breaks. | Students must be reminded that the lens has inverted the image. Depending on the solution you use, the thinnest portion of the film will therefore be seen at the bottom on the screen as an extended black area just before the bubble breaks. | ||
| - | |||
| - | General Location: | ||
| - | There are many parts for this demo and nothing is specifically set aside. There are many pictures below that will hopefully aid in constructing this demonstration. This demonstration could be made with simple house-hold products. | ||
| <WRAP group> | <WRAP group> | ||
| <WRAP half column> | <WRAP half column> | ||
| + | |||
| + | <WRAP box right> | ||
| + | {{solution1.mp4?400|}} | ||
| + | |||
| + | // Formation of interference patterns visible using solution no.1. // | ||
| + | </WRAP> | ||
| </WRAP> | </WRAP> | ||
| Line 84: | Line 90: | ||
| </WRAP> | </WRAP> | ||
| <WRAP tablewidth 100%> | <WRAP tablewidth 100%> | ||
| - | | **Location** | ---- | | + | | **Location** | A4 | |
| | **Maker** | Unknown | | | **Maker** | Unknown | | ||
| | **Current State** | Working | | | **Current State** | Working | | ||
demonstrations/6_optics/6d_interference/interference_fringes_in_a_soap_bubble/start.txt · Last modified: 2020/03/16 17:20 by demoroom
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