Assertion : Energy is created in constructive interference and energy is destroyed in destructive interference.
Reason : There is maximum intensity at the point of constructive interference.

Options

A. If both assertion and reason are correct and reason is a correct explanation of the assertion.
B. If both assertion and reason and correct but reason is not the correct explanation of assertion.
C. If assertion is correct but reason is incorrect.
D. If assertion is incorrect but reason is correct.

Answer

To analyze the question regarding the assertion and reason related to interference in waves, we will break down the concepts step by step.

### Step 1: Understanding the Assertion
The assertion states: "Energy is created in constructive interference and energy is destroyed in destructive interference."

**Analysis**:
- In wave interference, when two waves meet, they can either add together (constructive interference) or cancel each other out (destructive interference).
- However, the principle of conservation of energy states that energy cannot be created or destroyed; it can only be transformed or transferred.

**Conclusion**: The assertion is incorrect because it implies that energy is created or destroyed, which contradicts the conservation of energy principle.

### Step 2: Understanding the Reason
The reason states: "There is maximum intensity at the point of constructive interference."

**Analysis**:
- Constructive interference occurs when two waves are in phase, meaning their peaks and troughs align. This results in a higher amplitude of the resultant wave, leading to maximum intensity.
- Intensity is related to the square of the amplitude of the wave; therefore, at points of constructive interference, the intensity is indeed maximum.

**Conclusion**: The reason is correct because it accurately describes the phenomenon of maximum intensity during constructive interference.

### Step 3: Final Evaluation
Now, we need to evaluate the relationship between the assertion and the reason:
- The assertion is incorrect.
- The reason is correct.

### Final Answer
Thus, the correct option is that the assertion is incorrect, but the reason is correct.

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