Phase difference between any two points of a wavefront is

Options

A. `pi`
B. `pi//2`
C. 0
D. `pi//4`

Explanation

To solve the question about the phase difference between any two points of a wavefront, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Wavefront**: A wavefront is defined as the surface over which an oscillation has a constant phase. In simpler terms, it is the collection of all points that are at the same stage of oscillation in a wave.

2. **Phase of Points on a Wavefront**: Since all points on a wavefront oscillate in unison, they are said to be in the same phase. This means that if you were to measure the phase of any two points on the wavefront, they would both have the same phase value.

3. **Phase Difference Calculation**: The phase difference between two points is calculated as the difference in their phase values. However, since both points on a wavefront share the same phase, the phase difference is:
\[ \text{Phase Difference} = \text{Phase of Point A} - \text{Phase of Point B} = 0 \]

4. **Conclusion**: Therefore, the phase difference between any two points of a wavefront is 0.

5. **Answer Selection**: From the given options:
- Option 1: Pi
- Option 2: Pi/2
- Option 3: 0 (Correct)
- Option 4: Pi/4

The correct answer is Option 3: 0.

### Final Answer:
The phase difference between any two points of a wavefront is **0**.

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