1. The problem statement, all variables and given/known data Why can’t transverse waves travel through a gas or liquid? 2. Relevant equations 3. The attempt at a solution I understand that transverse waves require rigid medium through which to transfer their energy so they can travel through solids. I'll just accept that transverse waves can travel through a vacuum. I accept that transverse waves cannot travel through a liquid or gas because the medium is not solid BUT the light is a transverse wave and it passes through through the air (a gas) in our atmosphere. Also can see the torch light of a scuba diver in the ocean (a liquid). This is high school physics level.