Assertion : Electromagnetic waves interact with matter and set up oscillations
Reason : Interaction is independent of the wavelength of the electromagnetic wave.

Options

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

Explanation

To analyze the given assertion and reason, we will break down the concepts step by step.

### Step 1: Understanding the Assertion
**Assertion:** Electromagnetic waves interact with matter and set up oscillations.

- **Explanation:** Electromagnetic waves consist of oscillating electric and magnetic fields. When these waves encounter matter, they can cause the charged particles within the matter (like electrons) to oscillate. This interaction leads to energy transfer from the electromagnetic wave to the matter, resulting in oscillations of the particles.

### Step 2: Understanding the Reason
**Reason:** Interaction is independent of the wavelength of the electromagnetic wave.

- **Explanation:** The reason states that the interaction between electromagnetic waves and matter does not depend on the wavelength of the wave. However, this is incorrect. The extent and nature of the interaction (such as absorption and scattering) depend significantly on the wavelength of the electromagnetic wave. Different wavelengths can lead to different interactions with matter due to varying energy levels and resonances in the material.

### Step 3: Conclusion
- The assertion is true because electromagnetic waves do interact with matter and set up oscillations.
- The reason is false because the interaction does depend on the wavelength of the electromagnetic wave.

### Final Answer
Thus, the correct conclusion is that the assertion is true, but the reason is false.