Light: Speed of Light

The video explains the concept of speed, comparing the speeds of race cars and planes to the much faster speed of light. It highlights how light travels at 300,000 kilometers per second, making it the fastest known phenomenon. The video also contrasts the speed of light with sound, explaining why we see lightning before hearing thunder.

Which of the following travels faster than race cars and planes?

• Wind

• Light

• Sound

• Water

How fast do electromagnetic waves travel?

• 600,000 kilometers per second

• 150,000 kilometers per second

• 300,000 kilometers per second

• 450,000 kilometers per second

Why do we see light immediately after it is turned on?

• Because it is reflected

• Because it is closer to us

• Because it travels at 300,000 kilometers per second

• Because it is very bright

What is the main reason we see lightning before hearing thunder?

• Lightning is brighter

• Light travels faster than sound

• Thunder is quieter

• Sound is absorbed by clouds

Which of the following statements is true?

• Sound travels faster than light

• Light and sound travel at the same speed

• Light travels faster than sound

• Sound is faster than electromagnetic waves