41. Light year is a unit of(1) time (2) distance(3) sunlight intensity (4) mass

Break Down the Problem

1. Identify what a light year measures.
2. Evaluate the options provided: time, distance, sunlight intensity, mass.

Relevant Concepts

• A light year is defined as the distance that light travels in one year in a vacuum.

Analysis and Detail

1. Time: A light year involves a duration (one year), but it does not measure time directly.
2. Distance: A light year quantifies distance (approximately $9.46 \times 10^{12}$ kilometers).
3. Sunlight intensity: Light year does not measure light intensity; it is not related to how bright or dim light is.
4. Mass: A light year is not a measure of mass.

Verify and Summarize

Based on the definitions and analysis, the most accurate description of a light year pertains to distance, not time, sunlight intensity, or mass.

Final Answer

(2) distance