Question

Which of the following is correct about the electromagnetic waves?

• A. They always require a solid medium to travel
• B. They can travel through vacuum
• C. Electromagnetic waves can only travel through gases
• D. None of the above

Answer 1

Answer:

B. They can travel through vacuum

Electromagnetic waves do not necessarily require a medium – they can travel through vacuum. Light, radio waves, X-rays, are all electromagnetic waves.