Which statement about how light travels is true? a light waves need a medium to travel, and they travel at the same speed even if the light source is moving. b light waves can travel in a vacuum and travel at a constant speed even if the light source is moving. c light waves can travel in a vacuum and will travel faster if the light source is moving forward. d light waves need a medium to travel, and they travel faster if the light source is moving forward.

Light wave can travel in a vacuum and travel at a contest speed even if the light source is moving

Explanation:

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

at right angles to each other