Assignment+4

For this assignment, each person should locate two animations located on the web that help to explain topics that have been discussed in class this semester. If the animation can be embedded, great. If not insert a link to the animation. Each animation should be posted with a short description of the animation. With each animation please provide instructions on how to use the animation and why it would be useful for use with the topic.

Kate's Animations!!! [|Viscous Motion!]

This animation, showing aspects of fluid mechanics, allows you to change the density of the liquid, the density of the ball, the radius of the ball, and the amount of liquid viscosity. When you press the play button, the ball performs some type of motion that is consistent with the conditions you set. The animation also calculates the ball weight, the bouyant force on the ball, and the ball speed. A velocity vs. time graph is also sketched. The mutiple different calculations can help a student to understand the effects that density, radius, and viscosity have on an object submerged in a liquid.

To start this animation, simply click the link, pick your radius, viscosity level, and densities, and then click the play button! To restart, simply click the back button.

[|Reflection and Refraction]

This animation has two scence that you can choose from. The first is reflection and refraction from air to glass, and the second is reflection and refraction from glass to air. In both animations, you can choose the angle of incidence for the light ray and the index of refraction for the glass. The animation shows the light ray travelling in the first medium, and then through the second. It also calculates the angle of refraction for each light ray. Each scene shows a different representation of the light ray, as the light ray travels differently if it is going from air to glass than if it is going from glass to air.

Again, to start this animation, simply click the line, set your angle of incidence, and index of refraction for the glass, and watch the the ray bend. Press the "next scene" button to travel to the next scene, and press the "previous scene" button to travel back to the previous scene.

MICHAEL'S ANIMATIONS Animation 1 [] This animation will display a charged particle and will allow you bto set the speed of light to infinite or finite, but there is really no reason to set it to finite. After you choose your speed of light, you can press play and the charge will move up and down while displaying the resulting electric field line. It is also undergoing simple harmonic motion.

Animation 2 [] This animation is an animation that is very similar to one of the labs we did in our light unit. It shows a light source, an object, a lens, and a screen for the lens to project the image onto. It also displays where the lens porjects the image. The screen for the image moves back and forth automatically and shows how large or how small the image will be.

=Austin's Animations= []

This animation shows that when two objects are dropped their vertical acceration will always be G will be constant in the location. This animation helps demostrate that no matter how much force is applied in the x direction, the object will fall at the same rate. It could be used for projectile motion. On the right adjust the x velocity for the blue ball and hit play.

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This animation shows how refraction changes with different angles and indexes. This is useful because it can help us find how the index of refraction effects the angle of refraction. In the top left corner set the angle of incidence and in the bottom left corner set the index of refraction and the angle of refraction should bend more towards the normal as the index increases.

Alec's Animations __[]__ This animation shows color addition of the three primary colors: red, green, and blue It shows the other colors they make when added to each other. To use drag each square over another to see the colors you can make. __[]__ This animation shows pigment addition of the primary three pigments: Cyan, magenta, and yellow. To use click each of the colors of the left side bar and drag over each other to see what different colors you can make.

Animation 1 __[]__ This animation shows the relationship of interference between two different waves. When both the waves are opposite of each other this is an example of destructive interference. This is when the black wave is not visible. The sum of the two waves at their destructive interference position would be less then at least if not both of the waves. The point where the two waves line up is an example of constructive interference. This is when the black wave is at its peak. At this point the sum of both the waves is bigger than either of the singular waves. This helps the the relationship between two different waves and how they interact with each other to create different types of interferences. SImply click on the link above and the animation should start by itself. Animation 2

__[]__ This animation shows the different forces that act on a pendulum while in motion. The forces that this animation show are the force of gravity, tension, and the sum of both the forces. This diagram demonstrates that while the pendulum is hanging that the force of tension is always bigger than the force of gravity. If the force of gravity was larger then the ball would just fall towards Earth. This animation also demonstrates which direction the sum of the forces arrow is pointing which helps people understand why the pendulum moves the directions that it goes. Click on the link above and it should start atomatically.

Malory Groen's Animations  __[|Refraction Animation]__  This animation shows reflection and refraction of light from air to glass. By moving the top lever up and down, you can change the angle of incidence of the light from the air into the glass. By moving the bottom lever, you can change the index of refraction of the glass. This animation shows the affect of angle of incidence and index of refraction of a light ray passing from air to glass. The animation will also calculate angle of refraction given the angle of incidence and index of refraction of the glass. By pressing ‘next scene’ located at the bottom right corner, you can see the affects on a light ray from water to air. This animation works exactly the same as the first animation. However, this animation shows total internal reflection that can occur from water to air. This animation is useful to se how refraction works from one medium to another. It also helps to understand total internal reflection and the critical angle from a medium of a higher index of refraction to one with a lower index of refraction.  __[|Lenses and Mirrors Animation]__ <span style="background-color: transparent; color: #000000; display: block; font-family: Tahoma,Geneva,sans-serif; font-size: 13px; margin: 0in 0in 0pt; text-align: left; text-decoration: none;"> This is a thin lens animation featuring a converging lens. By clicking on the blue arrow on the left side of the lens (the object), you can change the height and distance away from the lens that the object is. This will then calculate the size, orientation, and distance from the lens that the image formed will be. By clicking the fifth box from the left, you can change the lens to a concave mirror and see the affects of the size and distance away from the mirror of the object on the image formed. This animation is useful in showing how the distance and size of the object will affect the distance, size, and orientation of the image in both a converging lens and concave mirror.

<span style="background-color: transparent; color: #000000; display: block; font-size: 16px; text-align: left; text-decoration: none;">__Nicole Hanlon's Animations__ [|Beats Animation] This animation shows how the concept of beats works. There are 6 scenes that are self explanatory for the most part. The link above will take you to the first scene. To travel from scene to scene use the green circle buttons with the arrows inside of them at the bottom. In scene 6 there are 3 buttons to the left. the top 2 are each single sounds at 2 slightly different HZ while the bottom one is the combination of the 2 and demonstrates beats. Caution, uses sound.

[|Polarization of Light Animation] This animation shows how the polarization of white light works. There is a wave of white light coming from left to right that travels through 2 polarizing screens. The angle of the screens can be changed by the sliders below each screen. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">**__JOSEPH KENKEL's ANIMATIONS__** =<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;"><span style="background-color: transparent; color: #0066cc; font-family: Times New Roman; font-size: 21px; text-align: left; vertical-align: auto;">__[|Waves: Constructive and Destructive Interference]__ = <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;">This animation shows and explains the constructive and destructive interference of two waves. The two waves, one red and one yellow, run over each other repeatedly. As the crests of two waves meet, the amplitude is doubled, showing a large resultant crest. As the crest of the red wave meets the trough of the yellow wave, they cancel out, leaving no waves at all. Then finally, as the troughs of both waves meet, the amplitude doubles and a large resultant trough appears. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> To see this animation, you don't have to do anything. Just click on the link. Once the video is done loading, it will start by itself and repeat over and over again. =<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;"><span style="background-color: transparent; color: #0066cc; font-family: Times New Roman; font-size: 21px; text-align: left; vertical-align: auto;">__[|Refraction: Internal Reflection]__ = <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;">This animation demonstrates the reflection of light in a block as it approaches and passes the point of internal reflection. The light source starts out pointing vertically, and is then lowered into the block. The light passes through the block until it reaches its **<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">critical angle ** (when the angle of refraction is 90 degrees and the light ray reflects across the block's surface). After it passes this point, the light has reached internal reflection, where it does not leave the block, but reflects off of its surfaces. This animation helped me fully understand what the **<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">critical angle ** and **<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;">internal reflection ** are. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> To see this animation, once again, just click on the link. The video will begin and repeat itself on a loop on its own. =<span style="background-color: transparent; color: #000000; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none; vertical-align: auto;"><span style="background-color: transparent; color: #0066cc; font-family: Times New Roman; font-size: 21px; text-align: left; vertical-align: auto;">__[|Sound Waves: Beats]__ = <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;">This animation explains the phenomenon of beats, which are made by two conflicting sound waves at slightly different frequencies. The demonstration has several slides, which effectively explain sound beats. The first scene is simply a basic description of beats, with an animation of two pitch forks with close, but differing frequencies. The second slide is a demonstration of two drums playing slightly different beats. Every so often the drums are synchronized, representing the behavior of beats of sound waves. The third slide is another representation of two sound waves, using oscillators at different frequencies. Just like on slide 2, the oscillators are synchronized every so often. The fourth and fifth slides, 'visualize the sum' of two waves, by displaying two waves and their resultant. It then goes on to show the mathematics of sound beats. Finally, on slide 6, there is an auditory demonstration of sound beats. This part is pretty cool. We get to hear what 2 almost-identical pitch frequencies separately, and then what they sound like together. The result is pretty amazing, proving what sound beats really sound like. <span style="background-color: transparent; color: #000000; display: block; font-family: Times New Roman; font-size: 16px; text-align: left; text-decoration: none;"> To use this animation, go through each slide. When you're done with one, click the button that says 'next scene'. Once you reach the final slide, click on each button separately to hear each demonstration. Click the 'stop' button to end the sound.

<span style="background-color: #ffffff; color: #0012ff; font-family: serif; font-size: 20.8px; text-align: start; text-decoration: none; vertical-align: baseline;">Animation 1- John Kintz

<span style="background-color: transparent; color: #000000; display: block; font-family: serif; font-size: 16px; text-align: center; text-decoration: none; vertical-align: baseline;">This animation displays the three primary colors of light and the secondary colors created by their combination. As the colors come together, you can see that green and blue makes cyan, red and blue makes magenta, and green and red makes yellow, the three secondary colors. This animation would be useful as a demonstration to show that all colors of light can be created by varying amounts of red, green, and blue. Also it can help students visualize the creation of the secondary colors, as well as that the three primary colors combined create what we see as white light.

__<span style="background-color: transparent; color: #000000; font-family: serif; font-size: 16px; text-align: start; vertical-align: baseline;">__<span style="background-color: #00ff00; color: #ff0000; font-family: serif; font-size: 20.8px; text-align: start; text-decoration: none; vertical-align: baseline;">Animation 2- John Kintz __ __

<span style="background-color: transparent; color: #000000; display: block; font-family: serif; font-size: 16px; text-align: center; text-decoration: none; vertical-align: baseline;">This animation of Newton's cradle depicts the conservation of momentum (P before=P after) through the four balls. When the ball on the edge strikes the next ball, the momentum transfers to that ball, through the next one, and to the ball on the other end. This causes the end ball to gain the same momentum that the first ball had and therefore reach the same height as the first ball. This animations would be useful as a demonstration to show that momentum is conserved in a frictionless environment.