Light year is the unit of

Options

A. time
B. length
C. speed
D. intensity of light

Answer

**Step-by-Step Solution:**

1. **Understanding the term "Light Year":**
- A light year is defined as the distance that light travels in a vacuum in one year.

2. **Identifying the nature of a light year:**
- Since a light year measures distance, it is important to categorize it correctly among the given options: time, length, speed, and intensity of light.

3. **Analyzing the options:**
- **Time:** A light year is not a measure of time; it measures how far light travels in a year.
- **Length:** A light year is indeed a measure of distance, which can also be referred to as length.
- **Speed:** While light travels at a certain speed, a light year itself does not measure speed; it measures distance.
- **Intensity of light:** This refers to the brightness or strength of light, which is not related to the concept of a light year.

4. **Conclusion:**
- Based on the definition and analysis, we conclude that a light year is a unit of length.

**Final Answer:**
- Light year is the unit of length.

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