The two waves of same frequency moving in the same direction give rise to

Options

A. Beats
B. Interference
C. Stationary waves
D. None of these

Answer

To solve the problem of two waves of the same frequency moving in the same direction, we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding the Problem**: We have two waves that are moving in the same direction and have the same frequency. We need to determine what phenomenon arises from this situation.

2. **Analyzing the Options**:
- **Option 1: Beats**:
- Beats occur when two waves of slightly different frequencies interfere with each other. The condition for beats is that the frequencies must be nearly equal but not exactly the same. Since the two waves in our case have the same frequency, beats cannot occur.

- **Option 2: Interference**:
- Interference is the phenomenon where two waves superpose to form a resultant wave. Since both waves have the same frequency and are moving in the same direction, they can interfere constructively or destructively. For example, if both waves have the same amplitude, they can constructively interfere to produce a wave with double the amplitude. Therefore, interference is indeed possible.

- **Option 3: Standing Wave**:
- Standing waves are formed when two waves of the same frequency and amplitude travel in opposite directions. Since our waves are moving in the same direction, they cannot form a standing wave.

- **Option 4: None of these**:
- This option is incorrect because we have already identified that interference is a valid phenomenon that can occur with the given conditions.

3. **Conclusion**: The only valid phenomenon that arises from two waves of the same frequency moving in the same direction is **interference**.

### Final Answer:
The two waves of the same frequency moving in the same direction give rise to **interference**.

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