Understanding the Concepts
* Speed: The rate at which an object or wave travels over a certain distance.
* Distance: The total length traveled.
* Time: The duration of the travel.
Formula
Speed = Distance / Time
Applying the Formula
* Distance = 900,000,000 meters (900 million meters)
* Time = 3 seconds
Speed = 900,000,000 meters / 3 seconds
Speed = 300,000,000 meters per second
Answer: The speed of the light wave is 300,000,000 meters per second (or 300 million meters per second).
