Assertion : The light year and wavelength consist of dimensions of length.
Reason : Both light year and wavelength represent time.

Options

A. If both Assertion and Reason are correct and Reason is the correct explaination of Assertion.
B. If both Assertion and Reason are correct but Reason is not the correct explaination of Assertion.
C. If Assertion is true but Reason is false.
D. If Assertion is false but Reason is true.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Analyze the Assertion
The assertion states: "The light year and wavelength consist of dimensions of length."

- A light year is defined as the distance that light travels in one year. Since it measures distance, it has the dimension of length (L).
- Wavelength, on the other hand, is the distance between successive crests of a wave. This also measures distance and thus has the dimension of length (L).

**Conclusion for Assertion**: The assertion is true because both light year and wavelength are measurements of length.

### Step 2: Analyze the Reason
The reason states: "Both light year and wavelength represent time."

- A light year is a measure of distance, not time. It indicates how far light travels in a year, but it does not measure time itself.
- Wavelength also does not represent time. It is a measure of the spatial period of a wave.

**Conclusion for Reason**: The reason is false because neither light year nor wavelength represents time; they both represent distance.

### Final Conclusion
Since the assertion is true and the reason is false, the correct option is that the assertion is true but the reason is false.

### Answer:
The correct option is: Assertion is true, but Reason is false.

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