A : Light waves can be polarised.
R : All electromagnetic waves move with same speed in vacuum.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze the assertion and reason provided, and determine their truthfulness and relationship.

### Step 1: Analyze the Assertion
The assertion states: "Light waves can be polarized."

- **Understanding Polarization**: Polarization refers to the orientation of the oscillations of a wave. Light waves, being transverse waves, can oscillate in multiple directions perpendicular to the direction of propagation. This characteristic allows them to be polarized.
- **Conclusion**: The assertion is true because light waves can indeed be polarized.

### Step 2: Analyze the Reason
The reason states: "All electromagnetic waves move with the same speed in vacuum."

- **Understanding Speed of Electromagnetic Waves**: It is a well-established fact in physics that all electromagnetic waves, including light, radio waves, microwaves, etc., travel at the same speed in a vacuum, which is approximately \(3 \times 10^8\) meters per second.
- **Conclusion**: The reason is also true.

### Step 3: Determine the Relationship Between Assertion and Reason
Now we need to evaluate whether the reason is the correct explanation for the assertion.

- **Reasoning**: While both the assertion and the reason are true, the reason does not explain why light waves can be polarized. The ability of light to be polarized is due to its transverse nature, not because of the speed of electromagnetic waves in a vacuum.
- **Conclusion**: The reason is not the correct explanation for the assertion.

### Final Conclusion
Both the assertion and the reason are true, but the reason is not the correct explanation of the assertion. Therefore, the correct answer is that both statements are true, but the reason does not explain the assertion.

### Answer: Option 2 is correct.

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