Today we worked and finished the questions we started on.
We learned that on a drip tank that areas that are lightly colored are showing the crests of a wave, and the areas that are darkly colored are showing the troughs of a wave. The light areas show that the rays are converging and the dark areas show that the rays are diverging causing the contrast in the waves.
We also learned that the frequency of a wave will not change when you increase the speed unless the source that is producing the wave changes.
We learned that when a wave hits off of a surface at an angle the wave that hits the surface is like the incident ray and the wave bouncing off is like the reflected ray. Mr.Banow said we would learn more about these terms when we learn about light.
We learned two new terms they were called diffraction and refraction.
-Diffraction->when a wave hits an opening or edge of an obstacle, the wave will change direction
-Refraction->when a wave changes a medium, the direction of travel does not change, and the wave is being entered at an angle.
We also learned what happens to a wave when it goes through a barrier with a small opening. It will curve around the edges forming a curved wave.
We also learned what happens when a wave hits a barrier with two openings. This will cause two separate waves to form and they will emerge with each other.
Then we went over our pendulum lab. We found out that amplitude does not change frequency or period. Changing the mass does not change frequency or period. Only changing the length will change frequency and period.
Rachel will write the next blog.
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