Which of the following are waves that can travel without a medium?

Question

Which of the following are waves that can travel without a medium?

visible light

seismic waves

waves on a lake

sound waves

x-rays

radio waves

Answer 1

Only light waves do not require a medium; these include:

1. visible light
2. x-rays
3. radio waves

The other waves are called "mechanical waves" and they do require a medium.