Use the drop-down menus to complete the statements. The ___ of light is the rate at which light travels through empty space, or about 300,000 km per second. A light-year is a measu... Use the drop-down menus to complete the statements. The ___ of light is the rate at which light travels through empty space, or about 300,000 km per second. A light-year is a measurement of ___. The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars ___.
Understand the Problem
The question is asking for information about light-years, including defining light as a measure of speed, understanding what a light-year measures, and why distance between stars is quantified in light-years.
Answer
speed of light; distance; is very large.
The statements should be completed as follows: The speed of light is the rate at which light travels through empty space, or about 300,000 km per second. A light-year is a measurement of distance. The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars is very large.
Answer for screen readers
The statements should be completed as follows: The speed of light is the rate at which light travels through empty space, or about 300,000 km per second. A light-year is a measurement of distance. The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars is very large.
More Information
The speed of light is about 300,000 kilometers per second. A light-year measures astronomical distances, which are vast, hence using light-years instead of simpler units like kilometers.
Tips
A common mistake is confusing a light-year as a unit of time instead of distance.
Sources
- Explanation on the speed of light and light-year - brainly.com
- What is a light-year? - NASA Science - science.nasa.gov
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