When radio waves passes through ionosphere, phase difference between space current and capacitive displacement current is

Options

A. 0 rad
B. `(3 pi // 2 )` rad
C. `(pi//2)` rad
D. `pi `rad

Answer

To solve the question regarding the phase difference between space current and capacitive displacement current when radio waves pass through the ionosphere, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Ionosphere**:
- The ionosphere is a layer of the Earth's atmosphere that is ionized by solar and cosmic radiation. It plays a crucial role in radio wave propagation.

2. **Identifying the Types of Currents**:
- **Space Current**: This refers to the current that flows through the space when radio waves propagate.
- **Capacitive Displacement Current**: This is related to the changing electric field in a capacitor-like structure, which can also occur in the ionosphere.

3. **Analyzing the Interaction of Radio Waves with the Ionosphere**:
- When radio waves pass through the ionosphere, they can either be transmitted directly or reflected back depending on their frequency and the ionospheric conditions.

4. **Considering the Phase Difference**:
- If the radio waves pass directly through the ionosphere without any reflection, the phase difference between the space current and the capacitive displacement current remains unchanged.
- In this case, the phase difference is 0 radians, meaning both currents are in phase.

5. **Conclusion**:
- Therefore, when radio waves pass through the ionosphere, the phase difference between the space current and the capacitive displacement current is 0 radians.

### Final Answer:
The phase difference between space current and capacitive displacement current when radio waves pass through the ionosphere is **0 radians**.

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