Answer the following question given this paragraph: The speed of sound in air is approximately , where is the temperature of the air in Celsius. The speed of light is 300,000 km/sec, which means it travels from one place to another on Earth more or less instantaneously. Let's say on a cool night (air temperature Celsius) you see lightning flash and then hear the thunder rumble five seconds later. How far away (in km) did the lightning strike?. Q: What travels at a rate of 300,000 kilometers per second, or nearly instantaneously? A:

Select from: --air. --sound. --gravity. --light.
Answer:
light