Question

Select the statement that correctly describes how light travels.

Light travels at different speeds when the light source is moving and cannot travel in a vacuum.

Light cannot travel through a vacuum and travels slower when the light source is moving away.

Light can travel in a vacuum, and the speed at which it travels changes if the source is moving.

Light travels at a constant speed through a vacuum, even if the light source is moving.

Answer 1

D is true

Answer 2

thank you :)