Waves Interference

The week before spring break we started the wave unit. We went and visited a government building where they did experiments and generalized while showing us the waves. This week we finished a lab where we needed to drop drops in a pond with or without obstacles, paper towels and clay, and see what was going to follow after the drops. We observed it and recorded at a sheet. In order to see how the waves work, we needed to visit this site (http://phet.colorado.edu/en/simulation/wave-interference) and try the application the helps us observe how the wave will be if the amplitude and frequency increase or decrease. This is a really good way of observing the affects that the changes have in the appearance of the waves because you can see it from both side at top, add slits like obstacles, add drips and changed frequency and amplitude that has a really big difference.

Try different combinations. Try increasing the amplitude or the frequency. Add another dripping faucet. Add a barrier (wall) or try a slit or two.  Try turning the sink to the side view.  How do these changes affect the appearance of the waves?  What have you learned about wave properties (wavelength, frequency, and amplitude) and how waves interact

• When the frequency and amplitude is low the wavelength is big but the wave is short
• When the frequency is low ans the amplitude is medium, the wavelength is about the same, as the first observation but the wave is taller.
• When it is the opposite, frequency medium and amplitude low, both wavelength and height is short
• When botg are medium the wave is medium size but the wavelength is short
• When the frequency is high and the amplitude remains the same, the wavelength is even shorter so is the height
• When it is the oposite, the waves are taller and the wavelength is big
• When they are both high, the wave is short so is th ewavelength
• When there is high frequency but low amplitude or the opposite, there is not wave
• When there is one or more slits but no space between them the wave stops suddenly when it meets the barrier(s)
• When the space between the slits increases, more and more waves come at the other side

When you change the frequency of the wave you control how many waves are in a time period.  The amplitude is the size of the drop you want to drop and it affects the waves by making them bigger or smaller.  
Pictures of Data I recorded in class:

Making waves lab:
Data Analysis: What pattern or relationships do you see in your data/ sketches/ images? In my sketches with the relationships between the waves created, I see that when we have the clay, the wave goes around it. When we have the paper towel the wave stops and when we have the foam ball, it rises it while moving it its direction. When we have both the clay and the foam ball, the clay slows the wave down a little bit and affects the ball by not moving that much as if the wave had come directly. Another important thing that my partner and I observed in this is lab is that the wave in the sides of the pond bounces, reflects, and creates another smaller wave going the opposite way. To add to this fact, when the waves don't have an obstacle or something to affect on, the wave keeps  up the same speed and has the same wavelength but when it has obstacles it kinds of slows down.

Conclusion: What do you conclude about he behavior of waves in the various situations you created today? Can you answer the guiding questions now? What I have concluded about the behavior of the waves is that in various situations it has a different affect. When it has obstacles it goes around it, in real life if it is a big wave it usually overlaps it or reaches a point of it. When there is an obstacle that is not stable and can be moved, not as powerful as the energy, it moves it. When there is not an obstacle or something on its way it keeps the same speed till it reaches the limits.

Guiding Questions:
When water is dropped from a pipette into a pan of water, how does the wave behave? The energy that we do creates a wave and forms other waves. When it meets the limits (Walls) it bounces off (reflects) and creates other smaller ones What properties does a mechanical wave have? The properties of a wave are: amplitude, frequency and wavelength  How do waves interact with each other and with solid objects in their paths? When two waves interact is when they meet each other. When they meet and have the same energy they continue but when they don't have the same energy they slow don't and suddenly stop. If there is an object in its path, it either goes around it, cover it or move it (like the foam ball used at the lab)

Hypothesis:

The water will create lots of ripples which each of them is bigger than the one before and often covers objects or smashes them if they stand on the wave's way.