The diagram below shows all the antinodal lines (dashed) and nodal lines (solid) due to two point sources tapping a water surface (the two dots in the middle of the circle are the two point sources). The sources are separated by an unknown distance d. The sources lie along a horizontal line.

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1, Are the two sources in phase or out of phase? Explain how you can tell from the diagram. If the two sources are out of phase, give the phase difference between the two sources. Explain.

2, 

The diagram below shows all the antinodal lines (dashed) and nodal lines (solid) due to two point sources tapping a water surface (the two dots in the middle of the circle are the two point sources). The sources are separated by an unknown distance \(d\). The sources lie along a **horizontal line**.

**Diagram Explanation:**
- **Antinodal Lines (Dashed Lines):** These lines represent areas where the wave interference is constructive, resulting in waves that are in phase and amplify each other.
- **Nodal Lines (Solid Lines):** These lines represent areas where the wave interference is destructive, causing the waves to cancel each other out, resulting in no net wave.
- **Point Sources (Two Dots):** The central dots are the origins of the wave sources, creating the interference pattern on the water surface.
- **Horizontal Line:** The line along which the two point sources are aligned.
Transcribed Image Text:The diagram below shows all the antinodal lines (dashed) and nodal lines (solid) due to two point sources tapping a water surface (the two dots in the middle of the circle are the two point sources). The sources are separated by an unknown distance \(d\). The sources lie along a **horizontal line**. **Diagram Explanation:** - **Antinodal Lines (Dashed Lines):** These lines represent areas where the wave interference is constructive, resulting in waves that are in phase and amplify each other. - **Nodal Lines (Solid Lines):** These lines represent areas where the wave interference is destructive, causing the waves to cancel each other out, resulting in no net wave. - **Point Sources (Two Dots):** The central dots are the origins of the wave sources, creating the interference pattern on the water surface. - **Horizontal Line:** The line along which the two point sources are aligned.
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