We then went to correct the work sheet Wave Characteristics. The answers to this work sheet should be on the slides. Since the slides were not posted yet, I'll give the answers. I'll only be posting the final answers since I'm unable to make the full equation.
1 a. 1.65m
1 b. 16.5m
2. 2.9m
3. 9.2 x 10^5 Hz
4. 12m/s
5 a. T = 8s
b. f = 0.125 Hz
c. 16 cm
d. 162m/s
We also corrected the Study Guide sheet and for those who missed the answers here they are:
Wave Interference:
- The speed of a mechanical wave does not depend on the amplitude or the frequency of the wave.
- It only depends on the properties of the medium.
- In a given medium, the speed of a wave with a large amplitude is equal to the speed of a wave with a small amplitude.
- In a a given medium, the speed of a high-frequency wave is equal to the speed of a low-frequency wave.
- When a wave reaches a boundary between one medium and another, the wave that reaches the boundary is called the incident wave.
- The wave that moves through the new medium is called the transmitted wave.
- Some of the energy of the incident wave moves backward from the boundary and is called the reflected wave.
- If the difference between the two media is small, most of the energy of the incident wave will be transmitted.
- If the difference between the two media is great, little of the energy will be transmitted.
- When a wave passes from a more dense to a less dense medium, the reflected wave is erect.
- When a wave is transmitted from one medium to another, the frequency of the wave does not change.
- The speed and the wavelength of the wave do change.
Superposition of Waves:
- When two or more waves move through a medium, each wave affects the medium independently.
- According to the principle of superposition, the displacement of a medium caused by two or more waves is the algebraic sum of the displacements caused by the individual waves.
- Constructive interference occurs when the wave displacements are in the same direction, and results in a wave with a(n) greater displacement.
- After the two pulses have passed each other, they have their original shape and size.
- Destructive interference occurs when the wave displacements are in opposite directions.
- If the amplitudes of the two pulses are equal but opposite, the displacement produced when the pulses meet is 0.
- If the amplitudes are unequal, destructive interference will not be complete.
Standing Waves:
- When two waves meet, a point in the medium that is always undisturbed by the wave is called a node.
- A node is produced by destructive interference.
- When two waves meet, the point int he medium where there is the greatest displacement is called the antinode.
- An antinode is produced by constructive interference.
- If the period of a wave is equal to the time it takes for the wave to travel to a fixed point and back, a(n) standing wave is produced.
- In this wave, the nodes and antinodes are stationary and the wave appears to be standing still.
We were given 2 worksheets to work on. Wave Superposition and Principle of Superposition, we were told Wave Superposition would be handed in. I've uploaded both worksheets onto to the blog.
Wave Superposition
Page 1
Page 2
Principle of Superposition
Page 1
Page 2
Just click on the image and you should be redirected with a better view of the worksheet.
Next Scribe: aapuya
1 comment:
Oops, we corrected the Wave Characteristic worksheet on the whiteboard not the Smartboard. And, sorry for being late on uploading the ch.14.2 study guide words.
Great post though.
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