a. speed, distance , very large
What is a light year?
Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
The speed of light measures the space traveled by electromagnetic waves every second.
In a vacuum, electromagnetic waves propagate at a constant velocity of approximately 299,792,458 meters per second.
In other words we can state that the speed of light refers to the rate that light travels through empty space.
Light-year is a unit of measurement used to calculate distances in astronomical space, i.e. where planets, stars, comets and so on are found.
The distances between the stars are huge, so to measure the immense dimensions of the universe requires the application of a special unit of measurement: the light year.
Because of this gigantic distance, the distance between the stars is measured in light years.
The complete question is given below:
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 _____ .
Learn more about light year here:https://brainly.com/question/1302132
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