LL12 [Light and Sound Waves: How Waves Travel in Media Video]

What is the speed of light in a vacuum in kilometers per second?

• 150,000 km/s

• 250,000 km/s

• 300,000 km/s

• 450,000 km/s

Which medium would electromagnetic waves travel fastest through?

• Water

• Vacuum

• Glass

• Air

Why do mechanical waves travel slower in gases compared to solids?

• Particles move faster

• Particles are static

• Particles are closer together

• Particles are more spread out

In which medium do mechanical waves travel the fastest?

• Vacuum

• Liquids

• Solids

• Gases

What is the primary reason electromagnetic waves do not need a medium to travel?

• They are non-material waves

• They are light waves

• They are inherently fast

• They can generate their own medium